npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2026 – Pkg Stats / Ryan Hefner

@rfjs/mongo-query

v0.1.1

Published

MongoDB query builder — generate MongoDB queries from filter metadata

Readme

@rfjs/mongo-query

MongoDB 查詢建構器,從結構化的過濾條件產生 MongoDB 查詢文件。

安裝

npm install @rfjs/mongo-query

使用方式

toQuery(field, type, condition, value)

為單一欄位條件產生 MongoDB 查詢。

import { toQuery } from '@rfjs/mongo-query';

toQuery('name', 'string', 'eq', 'Alice');
// { name: { '$eq': 'Alice' } }

toQuery('age', 'number', 'gte', 18);
// { age: { '$gte': 18 } }

toQuery('tags', 'string', 'terms', ['admin', 'active']);
// { tags: { '$in': ['admin', 'active'] } }

條件:'eq' | 'neq' | 'nin' | 'terms' | 'term' | 'gt' | 'gte' | 'lt' | 'lte' | 'range' | 'regex'

genFilterQuery(filterMetadata)

從過濾條件樹建立巢狀 MongoDB 查詢。

import { genFilterQuery } from '@rfjs/mongo-query';

const result = genFilterQuery({
  logic: 'and',
  filters: [
    { field: 'name', condition: 'eq', dataType: 'string', value: 'test' },
    {
      logic: 'or',
      filters: [
        { field: 'age', condition: 'gt', dataType: 'number', value: 18 },
        { field: 'address', condition: 'eq', dataType: 'string', value: null },
      ],
    },
  ],
});
// { '$and': [ { name: { '$eq': 'test' } }, { '$or': [ { age: { '$gt': 18 } }, { address: { '$eq': null } } ] } ] }

查詢類別

內建的查詢類別,用於常見操作:

  • EqQueryNeQueryNinQueryTermsQuery — 相等與成員比對
  • GTQueryGTEQueryLTQueryLTEQueryRangeQuery — 範圍比較
  • RegexQuery — 正規表示式比對
  • LogicalQuery$and$or$nor 組合

型別

interface MgoFieldCondition {
  field: string;
  condition: MgoConditionType;
  dataType: MgoDataType;
  value: ValueType;
}

interface MgoFilterMetadata {
  logic: 'and' | 'or' | 'nor';
  filters: Array<MgoFieldCondition | MgoFilterMetadata>;
}