GRAPHQL NESTED FRAGMENTS HOW TO

Can be used outside of React's render phase. SomeFragment.readInline is a function that takes an object containing a fragment reference for that particular fragment, and returns the fragment data. Your fragment needs to be annotated with for this function to appear. Use uses Relay's useFragment under the hood, which you can read more about here. e is a React hook that takes an object containing a fragment reference for that particular fragment, and returns the fragment data. %relay() is expanded to a module containing the following functions: use With that in mind, Let's jump in to mutations. We do that by defining a new root property inside resolvers.

GRAPHQL NESTED FRAGMENTS HOW TO

In our case, we want to tell GraphQL how to get the posts if we have the author.

You pass that fragmentReferences prop to the respective fragment's use hooks. Resolving nested queries in GraphQL When setting up a field whose value is a custom type, we have to define a function that tells GraphQL how to get that custom type. This contains references for all fragments that have been spread on that object. Any object where a fragment has been spread will have a prop called fragmentRefs.A component can use any number of fragments, not just one.They are optimized for performance and help promote well contained and isolated components However, none of them are specific to using Relay with ReScript, so you can read more about them in the Relay documentation below.īefore we move on to the next thing, there's a few things that's worth keeping in mind about fragments: There are a few more concepts around fragments that are worth spending some time to grok. Fragments are defined for an object type, like User. GraphQL includes fragments that allow you to wrap a set of fields for reuse across your different queries. That's a basic introduction to fragments. GraphQL allows you to go beyond this simple operation with complex queries that navigate nested objects or modify fetched data using object mutations. , and then the name of the fragment.Fragment UserProfileHeader_user on User make = ( ~ user ) => All of the fields we want are going to be pushed into the query when we use that fragment syntax. Then we have another forCustomerDetails. This can allow a single GraphQL request to replace many round-trip requests. This will take all of these fields and put them into the query. RESTful APIs allow you to pass a single set of arguments with the request, but in GraphQL, every field in nested objects can have their own set of arguments (if the fields support arguments). We see all of those fields are being returned. We can then push those fields into the query, hit prettify to get rid of that spacing issue again, and click play. We're going to specify that these fields come from the customer type, and we can add name and username from inCareOf. Since we're having so much fun with fragments, we can create a fragment for customer details. We should see the person who has checked out this pet. You can also add additional fields alongside your fragment. There we go, we get all of those fields for that pet. We're going to look for the pet C1, and here, we can reuse petDetails inside of the query so that we don't have to retype them.

Let's add onto this query a little bit and add petByID. If I wanted to grab the photo as well as the thumbnail, we can see that the thumbnail for the photo is being returned. Now, we can also adjust the fragment to add additional fields. We're able to send the query and see that all of the field are still being sent with the query. Supported, queryable using inline fragments as per neo4j-graphql-js, but can also be created using Nested Mutations. , to push all of the pet details into this query. Then we're going to cut and paste all of these fields into the fragment, and we'll use spread syntax. petDetails is going to be a fragment on a certain type. Think of a fragment of being a wrapper around several fields. 'combine' is the previous behavior that uses fragment type references without inlining the types (and might cause issues with deeply nested fragment that uses list types). 'inline' is the default behavior and will perform deep inlining fragment types within operation type definitions. I'm going to create a fragment called petDetails. Whether fragment types should be inlined into other operations. If only there was a way in the GraphQL query language to make all of these selection sets a little bit more reusable. We'll grab name, weight, and category, and we should see all of these available rabbits. We'll look for all the rabbits, and we'll also filter by status to find the available rabbits. See Fragment Reference (Nested Fragments) for more details about that. Instructor: Let's start by adding a query for all pets, and we want to filter this by category. Field Label Using the GraphQL API in AEM enables the efficient delivery of Content.

Graphql nested fragments