mirror of
https://github.com/ash-project/ash_graphql.git
synced 2024-09-20 13:24:14 +12:00
3a0b0c3f83
improvement: support `modify_resolution` for queries
822 lines
23 KiB
Elixir
822 lines
23 KiB
Elixir
defmodule AshGraphql.Graphql.Resolver do
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@moduledoc false
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require Ash.Query
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require Logger
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def resolve(
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%{arguments: arguments, context: context} = resolution,
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{api, resource,
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%{type: :get, action: action, identity: identity, modify_resolution: modify}}
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) do
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opts = [
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actor: Map.get(context, :actor),
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authorize?: AshGraphql.Api.authorize?(api),
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action: action,
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verbose?: AshGraphql.Api.debug?(api),
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stacktraces?: AshGraphql.Api.debug?(api) || AshGraphql.Api.stacktraces?(api)
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]
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filter = identity_filter(identity, resource, arguments)
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query =
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resource
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|> Ash.Query.new()
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|> Ash.Query.set_tenant(Map.get(context, :tenant))
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|> Ash.Query.set_context(Map.get(context, :ash_context) || %{})
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|> set_query_arguments(action, arguments)
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|> select_fields(resource, resolution)
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{result, modify_args} =
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case filter do
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{:ok, filter} ->
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query
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|> Ash.Query.filter(^filter)
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|> load_fields(resource, api, resolution)
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|> case do
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{:ok, query} ->
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result =
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query
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|> Ash.Query.for_read(action, %{}, actor: opts[:actor])
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|> api.read_one(opts)
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{result, [query, result]}
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{:error, error} ->
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{{:error, error}, [query, {:error, error}]}
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end
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{:error, error} ->
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query =
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resource
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|> Ash.Query.new()
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|> Ash.Query.set_tenant(Map.get(context, :tenant))
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|> Ash.Query.set_context(Map.get(context, :ash_context) || %{})
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|> set_query_arguments(action, arguments)
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|> select_fields(resource, resolution)
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|> load_fields(resource, api, resolution)
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{{:error, error}, [query, {:error, error}]}
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end
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resolution
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|> Absinthe.Resolution.put_result(to_resolution(result))
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|> modify_resolution(modify, modify_args)
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rescue
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e ->
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error = Ash.Error.to_ash_error([e], __STACKTRACE__)
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Absinthe.Resolution.put_result(resolution, to_resolution({:error, error}))
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end
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def resolve(
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%{arguments: args, context: context} = resolution,
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{api, resource, %{type: :read_one, action: action, modify_resolution: modify}}
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) do
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opts = [
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actor: Map.get(context, :actor),
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authorize?: AshGraphql.Api.authorize?(api),
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action: action,
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verbose?: AshGraphql.Api.debug?(api),
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stacktraces?: AshGraphql.Api.debug?(api) || AshGraphql.Api.stacktraces?(api)
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]
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query =
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case Map.fetch(args, :filter) do
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{:ok, filter} ->
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Ash.Query.filter(resource, ^filter)
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_ ->
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Ash.Query.new(resource)
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end
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query =
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query
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|> Ash.Query.set_tenant(Map.get(context, :tenant))
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|> Ash.Query.set_context(Map.get(context, :ash_context) || %{})
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|> set_query_arguments(action, args)
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|> select_fields(resource, resolution)
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{result, modify_args} =
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case load_fields(query, resource, api, resolution) do
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{:ok, query} ->
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result = api.read_one(query, opts)
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{result, [query, result]}
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{:error, error} ->
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{{:error, error}, [query, {:error, error}]}
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end
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resolution
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|> Absinthe.Resolution.put_result(to_resolution(result))
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|> modify_resolution(modify, modify_args)
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rescue
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e ->
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error = Ash.Error.to_ash_error([e], __STACKTRACE__)
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Absinthe.Resolution.put_result(resolution, to_resolution({:error, error}))
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end
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def resolve(
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%{arguments: args, context: context} = resolution,
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{api, resource, %{type: :list, action: action, modify_resolution: modify}}
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) do
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opts = [
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actor: Map.get(context, :actor),
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authorize?: AshGraphql.Api.authorize?(api),
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action: action,
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verbose?: AshGraphql.Api.debug?(api),
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stacktraces?: AshGraphql.Api.debug?(api) || AshGraphql.Api.stacktraces?(api)
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]
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page_opts =
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args
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|> Map.take([:limit, :offset, :after, :before])
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|> Enum.reject(fn {_, val} -> is_nil(val) end)
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opts =
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case page_opts do
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[] ->
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opts
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page_opts ->
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if Enum.any?(fields(resolution), &(&1 == :count)) do
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page_opts = Keyword.put(page_opts, :count, true)
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Keyword.put(opts, :page, page_opts)
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else
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Keyword.put(opts, :page, page_opts)
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end
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end
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query = load_filter_and_sort_requirements(resource, args)
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nested =
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if Ash.Resource.Info.action(resource, action, :read).pagination do
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"results"
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else
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nil
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end
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initial_query =
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query
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|> Ash.Query.set_tenant(Map.get(context, :tenant))
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|> Ash.Query.set_context(Map.get(context, :ash_context) || %{})
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|> set_query_arguments(action, args)
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|> select_fields(resource, resolution, nested)
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{result, modify_args} =
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case load_fields(initial_query, resource, api, resolution, nested) do
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{:ok, query} ->
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query
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|> api.read(opts)
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|> case do
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{:ok, %{results: results, count: count} = page} ->
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{{:ok, %{results: results, count: count}}, [query, {:ok, page}]}
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{:ok, results} ->
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if Ash.Resource.Info.action(resource, action, :read).pagination do
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result = {:ok, %{results: results, count: Enum.count(results)}}
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{result, [query, result]}
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else
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result = {:ok, results}
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{result, [query, result]}
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end
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error ->
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{error, [query, error]}
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end
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{:error, error} ->
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{{:error, error}, [query, {:error, error}]}
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end
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resolution
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|> Absinthe.Resolution.put_result(to_resolution(result))
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|> modify_resolution(modify, modify_args)
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rescue
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e ->
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error = Ash.Error.to_ash_error([e], __STACKTRACE__)
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Absinthe.Resolution.put_result(resolution, to_resolution({:error, error}))
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end
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def mutate(
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%{arguments: arguments, context: context} = resolution,
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{api, resource,
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%{type: :create, action: action, upsert?: upsert?, modify_resolution: modify}}
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) do
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input = arguments[:input] || %{}
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opts = [
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actor: Map.get(context, :actor),
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authorize?: AshGraphql.Api.authorize?(api),
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action: action,
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verbose?: AshGraphql.Api.debug?(api),
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stacktraces?: AshGraphql.Api.debug?(api) || AshGraphql.Api.stacktraces?(api),
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upsert?: upsert?
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]
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changeset =
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resource
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|> Ash.Changeset.new()
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|> Ash.Changeset.set_tenant(Map.get(context, :tenant))
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|> Ash.Changeset.set_context(Map.get(context, :ash_context) || %{})
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|> Ash.Changeset.for_create(action, input, actor: Map.get(context, :actor))
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|> select_fields(resource, resolution, "result")
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{result, modify_args} =
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changeset
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|> api.create(opts)
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|> case do
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{:ok, value} ->
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case load_fields(value, resource, api, resolution, "result") do
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{:ok, result} ->
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{{:ok, %{result: result, errors: []}}, [changeset, {:ok, result}]}
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{:error, error} ->
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{{:ok, %{result: nil, errors: to_errors(List.wrap(error))}},
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[changeset, {:error, error}]}
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end
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{:error, %{changeset: changeset} = error} ->
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{{:ok, %{result: nil, errors: to_errors(changeset.errors)}}, [changeset, error]}
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end
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resolution
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|> Absinthe.Resolution.put_result(to_resolution(result))
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|> modify_resolution(modify, modify_args)
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rescue
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e ->
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error = Ash.Error.to_ash_error([e], __STACKTRACE__)
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Absinthe.Resolution.put_result(resolution, to_resolution({:error, error}))
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end
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def mutate(
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%{arguments: arguments, context: context} = resolution,
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{api, resource,
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%{
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type: :update,
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action: action,
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identity: identity,
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read_action: read_action,
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modify_resolution: modify
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}}
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) do
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input = arguments[:input] || %{}
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filter = identity_filter(identity, resource, arguments)
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case filter do
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{:ok, filter} ->
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resource
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|> Ash.Query.filter(^filter)
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|> Ash.Query.set_tenant(Map.get(context, :tenant))
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|> Ash.Query.set_context(Map.get(context, :ash_context) || %{})
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|> set_query_arguments(action, arguments)
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|> api.read_one!(
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action: read_action,
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verbose?: AshGraphql.Api.debug?(api),
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stacktraces?: AshGraphql.Api.debug?(api) || AshGraphql.Api.stacktraces?(api)
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)
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|> case do
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nil ->
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result = not_found(filter, resource)
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Absinthe.Resolution.put_result(resolution, result)
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initial ->
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opts = [
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actor: Map.get(context, :actor),
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authorize?: AshGraphql.Api.authorize?(api),
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action: action,
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verbose?: AshGraphql.Api.debug?(api),
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stacktraces?: AshGraphql.Api.debug?(api) || AshGraphql.Api.stacktraces?(api)
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]
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changeset =
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initial
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|> Ash.Changeset.new()
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|> Ash.Changeset.set_tenant(Map.get(context, :tenant))
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|> Ash.Changeset.set_context(Map.get(context, :ash_context) || %{})
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|> Ash.Changeset.for_update(action, input, actor: Map.get(context, :actor))
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|> Ash.Changeset.set_arguments(arguments)
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|> select_fields(resource, resolution, "result")
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{result, modify_args} =
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changeset
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|> api.update(opts)
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|> update_result(resource, api, changeset, resolution)
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resolution
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|> Absinthe.Resolution.put_result(to_resolution(result))
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|> modify_resolution(modify, modify_args)
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end
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{:error, error} ->
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Absinthe.Resolution.put_result(resolution, to_resolution({:error, error}))
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end
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rescue
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e ->
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error = Ash.Error.to_ash_error([e], __STACKTRACE__)
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Absinthe.Resolution.put_result(resolution, to_resolution({:error, error}))
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end
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def mutate(
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%{arguments: arguments, context: context} = resolution,
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{api, resource,
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%{
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type: :destroy,
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action: action,
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identity: identity,
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read_action: read_action,
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modify_resolution: modify
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}}
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) do
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filter = identity_filter(identity, resource, arguments)
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input = arguments[:input] || %{}
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case filter do
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{:ok, filter} ->
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resource
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|> Ash.Query.filter(^filter)
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|> Ash.Query.set_tenant(Map.get(context, :tenant))
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|> Ash.Query.set_context(Map.get(context, :ash_context) || %{})
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|> set_query_arguments(action, arguments)
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|> api.read_one!(
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action: read_action,
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verbose?: AshGraphql.Api.debug?(api),
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stacktraces?: AshGraphql.Api.debug?(api) || AshGraphql.Api.stacktraces?(api)
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)
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|> case do
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nil ->
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result = not_found(filter, resource)
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Absinthe.Resolution.put_result(resolution, result)
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initial ->
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opts = destroy_opts(api, context, action)
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changeset =
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initial
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|> Ash.Changeset.new()
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|> Ash.Changeset.set_tenant(Map.get(context, :tenant))
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|> Ash.Changeset.set_context(Map.get(context, :ash_context) || %{})
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|> Ash.Changeset.for_destroy(action, input, actor: Map.get(context, :actor))
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|> Ash.Changeset.set_arguments(arguments)
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|> select_fields(resource, resolution, "result")
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{result, modify_args} =
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changeset
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|> api.destroy(opts)
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|> destroy_result(initial, resource, changeset, resolution)
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resolution
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|> Absinthe.Resolution.put_result(to_resolution(result))
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|> modify_resolution(modify, modify_args)
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end
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{:error, error} ->
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Absinthe.Resolution.put_result(resolution, to_resolution({:error, error}))
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end
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rescue
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e ->
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error = Ash.Error.to_ash_error([e], __STACKTRACE__)
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Absinthe.Resolution.put_result(resolution, to_resolution({:error, error}))
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end
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defp modify_resolution(resolution, nil, _), do: resolution
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defp modify_resolution(resolution, {m, f, a}, args) do
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apply(m, f, [resolution | args] ++ a)
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end
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def identity_filter(false, _resource, _arguments) do
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{:ok, nil}
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end
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def identity_filter(nil, resource, arguments) do
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case AshGraphql.Resource.decode_primary_key(resource, Map.get(arguments, :id) || "") do
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{:ok, value} -> {:ok, [id: value]}
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{:error, error} -> {:error, error}
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end
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end
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def identity_filter(identity, resource, arguments) do
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{:ok,
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resource
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|> Ash.Resource.Info.identities()
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|> Enum.find(&(&1.name == identity))
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|> Map.get(:keys)
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|> Enum.map(fn key ->
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{key, Map.get(arguments, key)}
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end)}
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end
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defp not_found(filter, resource) do
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{:ok,
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%{
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result: nil,
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errors:
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to_errors(
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Ash.Error.Query.NotFound.exception(
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primary_key: Map.new(filter || []),
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resource: resource
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)
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)
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}}
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end
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defp load_filter_and_sort_requirements(resource, args) do
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query =
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case Map.fetch(args, :filter) do
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{:ok, filter} ->
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Ash.Query.filter(resource, ^massage_filter(resource, filter))
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_ ->
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Ash.Query.new(resource)
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end
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case Map.fetch(args, :sort) do
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{:ok, sort} ->
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keyword_sort =
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Enum.map(sort, fn %{order: order, field: field} ->
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{field, order}
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end)
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fields =
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keyword_sort
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|> Keyword.keys()
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|> Enum.filter(&Ash.Resource.Info.public_aggregate(resource, &1))
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query
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|> Ash.Query.load(fields)
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|> Ash.Query.sort(keyword_sort)
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_ ->
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query
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end
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end
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defp massage_filter(_resource, nil), do: nil
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defp massage_filter(resource, filter) when is_map(filter) do
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Map.new(filter, fn {key, value} ->
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cond do
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rel = Ash.Resource.Info.relationship(resource, key) ->
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{key, massage_filter(rel.destination, value)}
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Ash.Resource.Info.calculation(resource, key) ->
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calc_input(key, value)
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true ->
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{key, value}
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end
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end)
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end
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|
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defp massage_filter(_resource, other), do: other
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defp calc_input(key, value) do
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case Map.fetch(value, :input) do
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{:ok, input} ->
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[{key, {input, Map.delete(value, :input)}}]
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:error ->
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{key, value}
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end
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end
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|
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defp clear_fields(nil, _, _), do: nil
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|
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defp clear_fields(result, resource, resolution) do
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resolution
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|> fields("result")
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|> Enum.map(fn identifier ->
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Ash.Resource.Info.aggregate(resource, identifier) ||
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Ash.Resource.Info.calculation(resource, identifier)
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end)
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|> Enum.filter(& &1)
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|> Enum.map(& &1.name)
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|> Enum.reduce(result, fn field, result ->
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Map.put(result, field, nil)
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end)
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end
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|
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defp load_fields(query_or_record, resource, api, resolution, nested \\ nil) do
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fields = fields(resolution, nested, false)
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|
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fields
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|> Enum.map(fn selection ->
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aggregate = Ash.Resource.Info.aggregate(resource, selection.schema_node.identifier)
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if aggregate do
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aggregate.name
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else
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calculation = Ash.Resource.Info.calculation(resource, selection.schema_node.identifier)
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if calculation do
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{calculation.name, selection.argument_data || %{}}
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end
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end
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end)
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|> Enum.filter(& &1)
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|> case do
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[] ->
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{:ok, query_or_record}
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|
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loading ->
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case query_or_record do
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%Ash.Query{} = query ->
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{:ok, Ash.Query.load(query, loading)}
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|
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record ->
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api.load(record, loading)
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end
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end
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end
|
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|
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defp select_fields(query_or_changeset, resource, resolution, nested \\ nil) do
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subfields =
|
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resolution
|
|
|> fields(nested)
|
|
|> Enum.map(&field_or_relationship(resource, &1))
|
|
|> Enum.filter(& &1)
|
|
|> Enum.map(& &1.name)
|
|
|
|
case query_or_changeset do
|
|
%Ash.Query{} = query ->
|
|
Ash.Query.select(query, subfields)
|
|
|
|
%Ash.Changeset{} = changeset ->
|
|
Ash.Changeset.select(changeset, subfields)
|
|
end
|
|
end
|
|
|
|
defp field_or_relationship(resource, identifier) do
|
|
case Ash.Resource.Info.attribute(resource, identifier) do
|
|
nil ->
|
|
case Ash.Resource.Info.relationship(resource, identifier) do
|
|
nil ->
|
|
nil
|
|
|
|
rel ->
|
|
Ash.Resource.Info.attribute(resource, rel.source_field)
|
|
end
|
|
|
|
attr ->
|
|
attr
|
|
end
|
|
end
|
|
|
|
defp fields(resolution, nested \\ nil, names_only? \\ true) do
|
|
if nested do
|
|
projected_once =
|
|
resolution
|
|
|> Absinthe.Resolution.project()
|
|
|> Enum.find(&(&1.name == nested))
|
|
|
|
type = Absinthe.Schema.lookup_type(resolution.schema, projected_once.schema_node.type)
|
|
|
|
projected_once
|
|
|> Map.get(:selections)
|
|
|> Absinthe.Resolution.Projector.project(
|
|
type,
|
|
resolution.path ++ [projected_once],
|
|
resolution.fields_cache,
|
|
resolution
|
|
)
|
|
|> elem(0)
|
|
|> names_only(names_only?)
|
|
else
|
|
resolution
|
|
|> Absinthe.Resolution.project()
|
|
|> names_only(names_only?)
|
|
end
|
|
end
|
|
|
|
defp names_only(fields, true) do
|
|
Enum.map(fields, fn %{schema_node: %{identifier: identifier}} ->
|
|
identifier
|
|
end)
|
|
end
|
|
|
|
defp names_only(fields, _) do
|
|
fields
|
|
end
|
|
|
|
defp set_query_arguments(query, action, arg_values) do
|
|
action = Ash.Resource.Info.action(query.resource, action, :read)
|
|
|
|
action.arguments
|
|
|> Enum.reject(& &1.private?)
|
|
|> Enum.reduce(query, fn argument, query ->
|
|
Ash.Query.set_argument(query, argument.name, Map.get(arg_values, argument.name))
|
|
end)
|
|
end
|
|
|
|
defp destroy_opts(api, context, action) do
|
|
if AshGraphql.Api.authorize?(api) do
|
|
[
|
|
actor: Map.get(context, :actor),
|
|
action: action,
|
|
verbose?: AshGraphql.Api.debug?(api),
|
|
stacktraces?: AshGraphql.Api.debug?(api) || AshGraphql.Api.stacktraces?(api)
|
|
]
|
|
else
|
|
[
|
|
action: action,
|
|
verbose?: AshGraphql.Api.debug?(api),
|
|
stacktraces?: AshGraphql.Api.debug?(api) || AshGraphql.Api.stacktraces?(api)
|
|
]
|
|
end
|
|
end
|
|
|
|
defp update_result(result, resource, api, changeset, resolution) do
|
|
case result do
|
|
{:ok, value} ->
|
|
case load_fields(value, resource, api, resolution, "result") do
|
|
{:ok, result} ->
|
|
{{:ok, %{result: result, errors: []}}, [changeset, {:ok, result}]}
|
|
|
|
{:error, error} ->
|
|
# Even though the loading of fields failed, the mutation was successful
|
|
{{:ok, %{result: nil, errors: to_errors(List.wrap(error))}}, {:ok, value}}
|
|
end
|
|
|
|
{:error, error} ->
|
|
{{:ok, %{result: nil, errors: to_errors(List.wrap(error))}}, {:ok, result}}
|
|
end
|
|
end
|
|
|
|
defp destroy_result(result, initial, resource, changeset, resolution) do
|
|
case result do
|
|
:ok ->
|
|
{{:ok, %{result: clear_fields(initial, resource, resolution), errors: []}},
|
|
[changeset, :ok]}
|
|
|
|
{:error, %{changeset: changeset} = error} ->
|
|
{{:ok, %{result: nil, errors: to_errors(changeset.error)}}, {:error, error}}
|
|
end
|
|
end
|
|
|
|
defp unwrap_errors([]), do: []
|
|
|
|
defp unwrap_errors(errors) do
|
|
errors
|
|
|> List.wrap()
|
|
|> Enum.flat_map(fn
|
|
%Ash.Error.Invalid{errors: errors} ->
|
|
unwrap_errors(List.wrap(errors))
|
|
|
|
errors ->
|
|
List.wrap(errors)
|
|
end)
|
|
end
|
|
|
|
defp to_errors(errors) do
|
|
errors
|
|
|> unwrap_errors()
|
|
|> Enum.map(fn error ->
|
|
if AshGraphql.Error.impl_for(error) do
|
|
AshGraphql.Error.to_error(error)
|
|
else
|
|
uuid = Ash.UUID.generate()
|
|
|
|
if is_exception(error) do
|
|
case error do
|
|
%{stacktrace: %{stacktrace: stacktrace}} ->
|
|
Logger.warn(
|
|
"`#{uuid}`: AshGraphql.Error not implemented for error:\n\n#{
|
|
Exception.format(:error, error, stacktrace)
|
|
}"
|
|
)
|
|
|
|
error ->
|
|
Logger.warn(
|
|
"`#{uuid}`: AshGraphql.Error not implemented for error:\n\n#{
|
|
Exception.format(:error, error)
|
|
}"
|
|
)
|
|
end
|
|
else
|
|
Logger.warn(
|
|
"`#{uuid}`: AshGraphql.Error not implemented for error:\n\n#{inspect(error)}"
|
|
)
|
|
end
|
|
|
|
%{
|
|
message: "something went wrong. Unique error id: `#{uuid}`"
|
|
}
|
|
end
|
|
end)
|
|
end
|
|
|
|
def resolve_assoc(
|
|
%{source: parent, arguments: args, context: %{loader: loader} = context} = resolution,
|
|
{api, relationship}
|
|
) do
|
|
api_opts = [
|
|
actor: Map.get(context, :actor),
|
|
authorize?: AshGraphql.Api.authorize?(api),
|
|
verbose?: AshGraphql.Api.debug?(api),
|
|
stacktraces?: AshGraphql.Api.debug?(api) || AshGraphql.Api.stacktraces?(api)
|
|
]
|
|
|
|
query = load_filter_and_sort_requirements(relationship.destination, args)
|
|
|
|
args
|
|
|> apply_load_arguments(query)
|
|
|> select_fields(relationship.destination, resolution)
|
|
|> load_fields(relationship.destination, api, resolution)
|
|
|> case do
|
|
{:ok, related_query} ->
|
|
opts = [
|
|
query: related_query,
|
|
api_opts: api_opts,
|
|
args: args,
|
|
tenant: Map.get(context, :tenant)
|
|
]
|
|
|
|
{batch_key, parent} = {{relationship.name, opts}, parent}
|
|
do_dataloader(resolution, loader, api, batch_key, args, parent)
|
|
|
|
{:error, error} ->
|
|
Absinthe.Resolution.put_result(resolution, to_resolution({:error, error}))
|
|
end
|
|
end
|
|
|
|
defp do_dataloader(
|
|
resolution,
|
|
loader,
|
|
api,
|
|
batch_key,
|
|
_args,
|
|
parent
|
|
) do
|
|
loader = Dataloader.load(loader, api, batch_key, parent)
|
|
|
|
fun = fn loader ->
|
|
{:ok, Dataloader.get(loader, api, batch_key, parent)}
|
|
end
|
|
|
|
Absinthe.Resolution.put_result(
|
|
resolution,
|
|
{:middleware, Absinthe.Middleware.Dataloader, {loader, fun}}
|
|
)
|
|
end
|
|
|
|
defp apply_load_arguments(arguments, query) do
|
|
Enum.reduce(arguments, query, fn
|
|
{:limit, limit}, query ->
|
|
Ash.Query.limit(query, limit)
|
|
|
|
{:offset, offset}, query ->
|
|
Ash.Query.offset(query, offset)
|
|
|
|
{:filter, value}, query ->
|
|
decode_and_filter(query, value)
|
|
|
|
{:sort, value}, query ->
|
|
keyword_sort =
|
|
Enum.map(value, fn %{order: order, field: field} ->
|
|
{field, order}
|
|
end)
|
|
|
|
Ash.Query.sort(query, keyword_sort)
|
|
end)
|
|
end
|
|
|
|
defp decode_and_filter(query, value) do
|
|
Ash.Query.filter(query, ^value)
|
|
end
|
|
|
|
defp to_resolution({:ok, value}), do: {:ok, value}
|
|
|
|
defp to_resolution({:error, error}) do
|
|
{:error,
|
|
error
|
|
|> unwrap_errors()
|
|
|> Enum.map(fn error ->
|
|
if AshGraphql.Error.impl_for(error) do
|
|
AshGraphql.Error.to_error(error) |> Map.to_list()
|
|
else
|
|
uuid = Ash.UUID.generate()
|
|
|
|
stacktrace =
|
|
case error do
|
|
%{stacktrace: %{stacktrace: v}} ->
|
|
v
|
|
|
|
_ ->
|
|
nil
|
|
end
|
|
|
|
Logger.warn(
|
|
"`#{uuid}`: AshGraphql.Error not implemented for error:\n\n#{
|
|
Exception.format(:error, error, stacktrace)
|
|
}"
|
|
)
|
|
|
|
[
|
|
message: "something went wrong. Unique error id: `#{uuid}`"
|
|
]
|
|
end
|
|
end)}
|
|
end
|
|
end
|