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simple-graphql-assembler
Advanced tools
The main goal of this package is to create type definitions and resolvers based on the selected folder .gql and .resolver.js files. The main funtion will create the input tpyeDefs and resolvers for the AppolloServer by searching for .gql and .resolver.js files.
The .gql file formats are not validated, just simply reduced to a one string variable.
// hero.gql
type Hero {
id: ID!
name: String!
actions: [Action]
}
extend type Query {
heroes: [Hero]
hero(id: ID!): Hero
}
It is required in the resolver modules to export a plain object with a __name property, because the package cannot figure out the key of the end resolver object.
// hero.resolver.js
const heroDb = require('../heroDb');
module.exports = {
__name: 'Hero',
actions(h) {
return h.actions;
},
Query: {
heroes() {
return [...heroDb];
},
hero(_, { id }) {
return heroDb.find(h => h.id === id);
},
},
};
The __name field will be removed from the final resolvers tree.
The gql file and resolver concatenations are separeted. The package will not search for specific resolver and type definition files. The patterns are based on the .gql extension and the .resolver.js postfix.
In the example i put the Query under the Hero resolver but it is not necessary, because the package will search for the Mutation or the Query named property in the resolver and moves them to the final tree in a separeted reduced property.
npm install simple-graphql-assembler
yarn add simple-graphql-assembler
const { ApolloServer, gql } = require('apollo-server');
const assemble = require('simple-graphql-assembler');
const { typeDefs, resolvers, errors } = assemble(__dirname);
/*
The errors contains the validation errors.
Two specific rules:
- Resolvers has to be a plain object
- Resolvers must contain a __name property (String)
*/
// validation errors
if (errors) {
console.log(errors);
process.exit(1);
}
console.log(resolvers);
/*
{ Mutation: { addAction: [Function: addAction] },
Action: { hero: [Function: hero] },
Query: { heroes: [Function: heroes], hero: [Function: hero] },
Hero: { actions: [Function: actions] } }
*/
const server = new ApolloServer({
typeDefs: gql(typeDefs),
resolvers,
});
server.listen().then(({ url }) => {
console.log(`Example server listen at ${url}`);
});
FAQs
Simple backend graphql shcema assembler for apollo projects
The npm package simple-graphql-assembler receives a total of 4 weekly downloads. As such, simple-graphql-assembler popularity was classified as not popular.
We found that simple-graphql-assembler demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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