const resolversFactory = require('crudgql')({ databaseEngine: 'objection', // enum['objection'|'mongoose'] findAllMethod: 'findAll', // method to findAll entities in your data manipulator module findOneMethod: 'find' // method to findOne entities in your data manipulator module }) const resolvers = resolversFactory({ entityName: 'movie', // controller should contain `findAllMethod` and `FindOneMethod` specified above entityCtl: require('./path/to/movie/controller'), // entity relations relations: [{ name: 'actors', // name of relation must be specified as it specified in parent model controller: require('./path/to/actor/controller'), type: 'many', // type of relation relative to parent(e.g. movie --one to many-- actors) relations: ['roles'] // relations of relation. Here you must specify only it`s names as specified in parent model(here parent model is `actor`) }, { name: 'franchise', controller: require('./path/to/franchise/controller'), type: 'one', relations: ['lordOfTheRings', 'HP', 'starWars'] }] })

resolvers == { Query: { movie: async (_, query) => { const res = await entityCtl[findOneMethod]( formatQuery(query.where), // method from https://github.com/devstark-com/open-crud-parser { relations: relationsExpression } // relationsExpression - specific to your databaseEngine // examples: // mongo: [{ path: 'actors' }, { path: 'franchise' }] // objection: '[actors(selectId), franchise(selectId)]' or for one relation 'actors(selectId)' ) if (!res) throw new ValidationError(`${entityNameUc} not found`) return res }, movies: async (_, query) => entityCtl[findAllMethod]( formatQuery(query.where), { orderBy: formatOrderBy(query.orderBy), // method from https://github.com/devstark-com/open-crud-parser relations: relationsExpression }) }, Mutations: { createMovie: async (_, { data }) => entityCtl[createMethod]( data, { relations: relationsExpression } ), updateMovie: async (_, { where, data }) => entityCtl[updateMethod]( formatQuery(where), // method from https://github.com/devstark-com/open-crud-parser data, { relations: relationsExpression } ), deleteMovie: async (_, { id }) => entityCtl[deleteMethod](id) }, Movie: { actors: async function (parent, query) { if (!parent[relation.name]) return [] const relatedIds = parent[relation.name].map(c => c.id) if (!query.where) query.where = { id_in: relatedIds } // id_in query parameter specific to OpenCRUD else if (!query.where.id_in) query.where.id_in = relatedIds else query.where.id_in.push(...relatedIds) return relation.controller[findAllMethod]( formatQuery(query.where), { orderBy: formatOrderBy(query.orderBy), relations: relationsExpression }) }, franchise: async function (parent, query) { if (!parent[relation.name]) return null const relatedId = parent[relation.name].id if (!query.where) query.where = { id_in: [relatedId] } else if (!query.where.id_in) query.where.id_in = [relatedId] else query.where.id_in.push(relatedId) return relation.controller[findOneMethod]( formatQuery(query.where), { relations: relationsExpression }) }, } }