graphql-compose-mongoose/lib/resolvers/helpers/limit.js.flow

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

/* @flow */

import type { ComposeFieldConfigArgumentMap } from 'graphql-compose';
import type { ExtendedResolveParams } from '../index';

export type LimitHelperArgsOpts = {
  defaultValue?: number,
};

export const limitHelperArgs = (opts?: LimitHelperArgsOpts): ComposeFieldConfigArgumentMap => {
  return {
    limit: {
      type: 'Int',
      defaultValue: (opts && opts.defaultValue) || 1000,
    },
  };
};

export function limitHelper(resolveParams: ExtendedResolveParams): void {
  const limit = parseInt(resolveParams.args && resolveParams.args.limit, 10) || 0;
  if (limit > 0) {
    resolveParams.query = resolveParams.query.limit(limit); // eslint-disable-line
  }
}