![graphql fragments graphql fragments](https://code-maze.com/wp-content/uploads/2019/04/15-Fragments.gif)
Running this command is part of the procedure of building a new app and pushing it to a new live site. Next, they have created a wrapper to be run with yarn run validate-queries, to make it easier to run the commands. Underneath, the tool graphql-cli is used, in combination with a configuration file. node_modules/.bin/graphql validate-magento-pwa-queries -project pwatest, the current queries are matched with the current schemas.
![graphql fragments graphql fragments](https://atendesigngroup.com/sites/default/files/graphql-query-05.png)
node_modules/.bin/graphql get-schema -project pwatest, the schemas are downloaded. Magento PWA Studio faces a similar problem and uses a slightly same but different approach.
![graphql fragments graphql fragments](https://i.ytimg.com/vi/LE-dpEGyGsE/maxresdefault.jpg)
In short, it checks whether the React queries are compatible with the Magento GraphQL API. The command not only downloads the schema into a JSON file, it also validates whether queries in the documents folder (in my case src/state/graphql/queries/*.graphql) are still validating correctly against the schema.
Graphql fragments full#
(See the sources on GitHub if you want to see the full example.) To generate this JSON, I used a tool called graphql-codegen with a command graphql-codegen -config codegen.yml and a YAML of the following: overwrite: trueĭocuments: "src/state/graphql/queries/*.graphql" In the example, you can see that a file is used to read data from Magento. It cleans up the code, improves readability and reusability.Īn example fragment might be used like this: fragment NameParts on Person ), Provided you are familiar with GraphQL, you have probably already heard or maybe even played with fragments: Thanks to fragments, you can prevent duplication of query snippets, simply by moving generic pieces of your queries (or mutations) into fragments. Let's have a peak, so we can make things simple again. However, the more progress you make, the more complex some issues might come: One such a topic is GraphQL introspection. You build yourself a React app, running simple GraphQL queries towards a Magento shop and you hope for the best. Sometimes you may forget to import the fragment and Apollo can return some unhelpful messages.It begins so simple. If we have many presentational components within a container component, importing them all can be hairy. Importing many fragments into a single GraphQL query isn’t the best experience. Fragments sometimes become difficult to manage It’s not too much work, but it is more work than the alternative. If we want to migrate over to a component library for others to use, these components will need to be refactored to have their fragments removed. The crummy thing is that our presentational components become more coupled to the application and API data model. Presentational components are not generic Of course, like everything in programming, there are trade-offs in this approach.
![graphql fragments graphql fragments](https://i.ytimg.com/vi/nXxP3oWYwUA/maxresdefault.jpg)
This of course is only possible defining the API in advance which sometimes isn’t always the case.
Graphql fragments code#
What may happen is that during app integration, props are defined incorrectly.ĭefining the fragment of the GraphQL graph this component needs to render, there are fewer chances of code changes when integration happens due to forcing the developer to know the exact shape of the data it needs to render. With Storybook becoming popular, many developers are starting to develop components in Storybook first and then integrating them into the app at a later time. When the fragment changes, after you generate types, no prop changes needed! Less chance of changes when developing component first After this, it passes down the data to its presentational components which need it to render, GithubIssueInfoCard. In the Container Component pattern, we would have a “container” component, GithubIssueListContainer, which handles running the query. Let’s say we have a component that renders a list of Github issues showing their title. This can be better achieved by each component, even presentational ones, defining the data they need to render with their own GraphQL fragment. When creating isolated components, they should define the data they need to render. If using GraphQL for your data transport, we want to keep using this pattern but with a new twist. When the component count starts to grow and we start to fetch data, we need a new pattern, the Container Component pattern. These continue the philosophy of isolation and allow for design and prototyping outside the main application. Another benefit is using showcase apps such as Storybook. One of the great reasons to use a component-based framework (React, Vue) is that it allows for more isolated component design, which helps with decoupling and unit-testing.