Core contributor of urql here. Probably a late reply, but better than never There are distinct advantages and disadvantages of using one of the three over the others. Relay is strict in terms of what it requires from your schema, but that means that it has very easy-to-use patterns for the most common use cases. … Read more
Two Solutions There are two ways to do that. One is quick and easy and will work for a specific query with some limitation, and the other is a general solution that is safer and can work for multiple queries. Quick and Easy Solution Advantages it’s quick and… easy When you configure your query you … Read more
Scalars can’t be used as part of unions, since per the specification, unions specifically “represent an object that could be one of a list of GraphQL Object types.” Instead, you can use a custom scalar. For example: const MAX_INT = 2147483647 const MIN_INT = -2147483648 const coerceIntString = (value) => { if (Array.isArray(value)) { throw … Read more
In graphql-js resolvers expose a fourth argument called resolve info. This field contains more information about the field. From the GraphQL docs GraphQLObjectType config parameter type definition: // See below about resolver functions. type GraphQLFieldResolveFn = ( source?: any, args?: {[argName: string]: any}, context?: any, info?: GraphQLResolveInfo ) => any type GraphQLResolveInfo = { fieldName: … Read more
There’s two common reasons your field or fields are resolving to null: 1) returning data in the wrong shape inside your resolver; and 2) not using Promises correctly. Note: if you’re seeing the following error: Cannot return null for non-nullable field the underlying issue is that your field is returning null. You can still follow … Read more
Follow this https://github.com/facebook/graphql/issues/215, Graphql does not support scalar union types currently, you can do this union IntOrString = IntBox | StringBox type IntBox { value: Int } type StringBox { value: String } or you can have your custom type, see this graphql, union scalar type?
As of September 2017, this is not possible. There is an ongoing discussion around this functionality.
GraphQL is two things: A query language A Type System When a GraphQL server receives a query to process it generally comes in as a single String. This string must be split into meaningful sub-strings (tokenization) and parsed into a representation that the machine understands. This representation is called an abstract syntax tree, or AST. … Read more
I had a look at the GraphQL spec. The ID scalar type represents a unique identifier, often used to refetch an object or as the key for a cache. The ID type is serialized in the same way as a String; however, it is not intended to be humanâreadable. While it is often numeric, it … Read more
Please replace your expressGraphQL with graphqlHTTP as it was destructured Use: const { graphqlHTTP } = require(‘express-graphql’); or const expressGraphQL = require(‘express-graphql’).graphqlHTTP This is because a method called graphqlHTTP exist in the express-graphql module and you are destructure with another method name that does not exist in the module I also noticed that you have … Read more