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# Wellington Elixir Meetup GraphQL Lightning Talk
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## Because I counldn't think of a snappier title
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# What the heck is GraphQL anyway?
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This is a very quick overview of what GraphQL is and what it's useful for. A lot of this info can be gleaned directly from the [Absinthe](https://absinthe-graphql.org/) documentation.
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According to [graphql.org](https://graphql.org/) GraphQL is "A query language
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for your API" which is really only part of it.
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Things we're going to cover in this presentation:
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[Demo time](https://www.graphqlhub.com/playground?query={%0A%20%20graphQLHub%0A%20%20giphy%20{%0A%09%09random(tag%3A%22graphql%22)%20{%0A%20%20%20%20%09id%0A%20%20%20%20%20%20url%0A%20%20%20%20%20%20images%20{%0A%20%20%20%20%20%20%20%20original%20{%0A%20%20%20%20%20%20%20%20%20%20url%0A%20%20%20%20%20%20%20%20}%0A%20%20%20%20%20%20}%0A%20%20%09}%0A%20%20}%0A})
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* What the heck is GraphQL anyway?
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* Setting it up with Phoenix
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* Handling Queries
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* Handling Mutations
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* Handling Subscriptions
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* Extra for experts
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GraphQL is a specification for the GraphQL query language and how servers and
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clients should interact to implement those queries. The [GraphQL
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specification](https://github.com/facebook/graphql) is maintained by Facebook
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and should probably be treated with care (anyone who has had to maintain a
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react-native app knows what I'm talking about). Facebook's philosophy of "move
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fast and break things" is great for products but is not great for software
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dependencies.
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To get started checkout the `step-1` branch.
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Still, there are plenty of open source implementations of the spec now and you
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don't need to rely on Facebook's implementations of the server or client. At
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this time my gut feeling is still "avoid react/relay" but I know plenty of
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people who have and are building successful apps with them.
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Notable efforts include [Apollo](https://www.apollographql.com/), developed by
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the [Meteor team](https://www.meteor.com/) it includes a JavaScript server,
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browser client and a bunch of other stuff (like bindings for various JavaScript
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frameworks). We'll be using the Apollo client in our demonstrations today.
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Still, this is an Elixir talk so you're probably most interested in hearing
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about [Absinthe](https://absinthe-graphql.org/). Check out the `step-2` branch
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to learn about it.
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