1/3/2024 0 Comments Graphql fragments![]() ![]() ![]() Gatsby uses plugins which can fetch data from different sources. Most usages of GraphQL involve manually creating a GraphQL schema. Where does Gatsby’s GraphQL schema come from? To pair Gatsby’s native build-time GraphQL with GraphQL queries running againstĪ live GraphQL server from the browser. Gatsby is a great framework for building apps so it’s possible and encouraged a databaseĪnd Node.js service) to use GraphQL for production websites. This is unique, and it means you don’t need to run additional services (e.g. Gatsby uses GraphQL at build-time and not for live Retrieve data from databases and/or other APIs. The shape of your data) for your GraphQL server and then your GraphQL resolvers You define a schema (a schema is a formal way of describing Most people run GraphQL on a server to respond live to requests forĭata from clients. With many different programming languages and for web and native apps. One of the great things about GraphQL is how flexible it is. The official Gatsby tutorial also includes an introduction to using GraphQL specifically with Gatsby. When starting out with GraphQL, we recommend the following two tutorials: Your experience developing with Gatsby might be the first time you’ve seen GraphQL! We hope you love it as muchĪs we do and find it useful for all your projects. Any top-level fields - like site in the diagram - are sometimes referred to as root level fields, though the name doesn’t signify functional significance as all fields in GraphQL queries behave the same. The four words site, id, siteMetadata, and title are marked as “Fields”. This is similar to how you would name a function or a variable, and like a function this can be omitted if you would rather the query be anonymous. SiteInformation is marked as the “Operation Name”, which is a unique name that you assign to a query yourself. ![]() The diagram marks the word query as the “Operation Type”, for Gatsby’s uses the only operation type you will deal with is query, this can be omitted from your queries if you prefer (like in the above example). The following diagram shows a GraphQL query, with each word highlighted in a color corresponding to its name on the legend: Note: To run GraphQL queries in non-page components you’ll need to use Gatsby’s Static Query feature. GraphQL and Gatsby let you ask for data and then The result of the query is automatically inserted into your React component Queries look like JSON:Ī basic page component with a GraphQL query might look like this: GraphQL lets you ask for the exact data you need. Improve performance by removing data bloat - GraphQL enables you to select only the data you need, not whatever an API returns.It’s the perfect data querying language for the often complex/nested data dependencies of modern applications.Push frontend complexity into queries - many data transformations can be done at build-time within your GraphQL queries.Just ask for the data you need with a GraphQL query and it’ll show up when you need it Eliminate frontend data boilerplate - no need to worry about requesting & waiting for data.Why is GraphQL so cool?įor a more in-depth look, read why Gatsby uses GraphQL. Since all data is combined in the data layer, it’s even possible to query multiple sources at the same time. The example given in the docs is repeated here for convenience.Data returned by GraphQL comes back in the exact same shape that you asked for it, without having to travel across the network because it was already gathered at build time. The way to pass data to variables in fragments is to do it through the root query the fragments are part of. I was going through the documentation and found something which I feel is odd. ![]()
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