graphql-compose-mongoose/node8/resolvers/findById.js

Plugin for `graphql-compose` which derive a graphql types from a mongoose model.

'use strict';

exports.__esModule = true;
exports.default = findById;

var _helpers = require('./helpers');

function findById(model, tc, opts // eslint-disable-line no-unused-vars
) {
  if (!model || !model.modelName || !model.schema) {
    throw new Error('First arg for Resolver findById() should be instance of Mongoose Model.');
  }

  if (!tc || tc.constructor.name !== 'TypeComposer') {
    throw new Error('Second arg for Resolver findById() should be instance of TypeComposer.');
  }

  return new tc.constructor.schemaComposer.Resolver({
    type: tc.getType(),
    name: 'findById',
    kind: 'query',
    args: {
      _id: 'MongoID!'
    },
    resolve: resolveParams => {
      const args = resolveParams.args || {};

      if (args._id) {
        resolveParams.query = model.findById(args._id); // eslint-disable-line
        (0, _helpers.projectionHelper)(resolveParams);
        return resolveParams.query.exec();
      }
      return Promise.resolve(null);
    }
  });
}