#Luvit MongoDB Driver

This is a pure luvit Mongodb driver with async Api.

What is Luvit?

Luvit is a Node.js like, with Asynchronous I/O support language for Lua.

See more at: Luvit

Install

• With lit:

  Run

  lit install cyrilis/luvit-mongodb

in terminal under your project path, then require("luvit-mongodb") in your project.

• Or copy source files:

  Just put source file in your project, then require it with ./path/to/luvit-mongodb

• ~~Or with NPM:~~ (Not recommended)

  ~~If you would like to install with NPM, you can just run npm install luvit-mongodb in terminal under your project path. then require module/luvit-mongodb in your project.~~

Getting started

local Mongo = require("luvit-mongodb")
local db = Mongo:new({db = "DATABASE_NAME"}) 
-- replace `DATABASE_NAME` above with a DB name.
db:on("connect", function()
	-- Do stuff here.
    local Post = db:collection("post")
    local page = 1
    Post:insert({
		    title = "Hello word!", 
		    content = "Here is the first blog post ....",
		    author = "Cyril Hou"
		},function(err, res)
		    p(res)
	    end)
	local posts = Post:find({author = "Cyril Hou"})
	posts:limit(10):skip(page * 10):update({authorAge = 25}):exec(function(err, res)
		p(err, res)
	end)
	
	Post:distinct("category", function(err, res)
		p("All distinct value of `category` in post collections: ", res)
	end)
end)

Cursor

• update

cursor:update(doc[, callback])

• doc: table, required, The modifications to apply.
• callback: optional, callback function

post:update({abc = 123}, function(err, res)
    p(err, res)
end)
-- same as bellow ⬇️
 post:update({abc = 123}):exec(function(err, res)
    p(err, res)
end)

• find

cursor:find(query[, callback])

• query: table, optional , Specifies selection criteria using query operators. To return all documents in a collection, omit this parameter or pass an empty document ({}).
• callback: optional， callback function

post:find({abc = 123}, function(err, res)
   p(err, res)
end)
-- same as bellow ⬇️
post:find({abc = 123}):exec(function(err, res)
   p(err, res)
end)

• remove

cursor:remove([callback])

• callback: optional, callback function

post:remove(function(err, res)
   p(err, res)
end)
-- same as bellow ⬇️
post:remove():exec(function(err, res)
   p(err, res)
end)

• skip

cursor:skip(skip[, callback])

• skip: number, docs to skip in query.

• callback: optional, callback function

• limit

cursor:limit(limit[, callback])

• limit: number, limit return docs count.

• callback: optional, callback function

• count

cursor:count([callback])

• callback: optional, callback function

post:count(function(err, res)
   p(err, res)
end)
-- same as bellow ⬇️
post:remove():exec(function(err, res)
   p(err, res)
end)

• exec

cursor:exec(callback)

• callback: required, callback function Execute callback function after set query and limit skip params.

Collection

• initialize

A collection should initialize with db instance. db:collection(collectionName)

• collectionName: string, name for collection in name.

   local coll = db:collection("post")

• find

coll:find(query[, callback])

• query: table, optional, Specifies selection criteria using query operators. To return all documents in a collection, omit this parameter or pass an empty document ({}).
• callback: function, optional, callback function.

    coll:find({id = 1}):exec(function(err, res)
   	 p(err, res)
    end)
    -- same as bellow ⬇️
    coll:find({id = 1}, function(err, res)
   	 p(err, res)
    end)

• distinct

  coll:distinct(field[, query][, callback])

• field: string, required, The field for which to return distinct values.

• query: table, optional, A query that specifies the documents from which to retrieve the distinct values.

• callback: function, optional, Callback function.

coll:distinct("category", {public = true}, function(err, res)
	p(err, res)
end)

• drop

coll:drop(callback)

• callback: function, required, callback function

coll:drop(function(err, res)
    p(err, res)
end)

• findAndModify

coll:findAndModify(query, update[, callback])

• query: table, required, Optional. The selection criteria for the modification. The query field employs the same query selectors as used in the collection.find() method. Although the query may match multiple documents, findAndModify() will only select one document to modify.
• update: table, required, The update field employs the same update operators or field: value specifications to modify the selected document.
• callback: function, optional, Callback function.

coll:findAndModify({abc = 123}, {def = true}, function(err, res)
   	 p(err, res)
end)

• findOne

coll:findOne(query[, callback])

• query: table, required, Optional. The selection criteria for the modification. The query field employs the same query selectors as used in the collection.find() method. Although the query may match multiple documents, findAndModify() will only select one document to modify.
• callback: function, optional, Callback function.

coll:findOne({abc = 123}, function(err, res)
   	 p(err, res)
end)

• remove

coll:remove(query[, callback])

• query: table, required, Optional. The selection criteria for the modification. The query field employs the same query selectors as used in the collection.find() method
• callback: function, optional, Callback function.

coll:remove({public = false}, function(err, res)
    	p(err, res)
end)

• insert

coll:insert(doc[, callback])

• doc: table, required, A document or array of documents to insert into the collection.
• callback: function, optional, Callback function.

coll:insert({title = "Hello World!"}, function(err, res)
     	p(err, res)
end)

chainable cursor example:

coll:find():update({public = true}):exec(function(err, res)
	p(err, res)
end)

Database

• ###insert: db:insert(collection, document, continue, callback)

  • collection: Database collection name, required
  • document: lua table, required
  • continue: if continue when error occured
  • callback: function, with inserted document as #1 parameter

• ###find: db:find(collection, query, fields, skip, limit, callback)

  • collection: Database collection name, required
  • query: mongodb query eg: { type: { $in: [ 'food', 'snacks' ] } } or just { type: "snacks" }, required
  • fields: limit field for return, eg: { item: 1, qty: 1, _id:0 }
  • skip: skip counts, int
  • limit: limit return counts, int
  • callback: function, with found documents array as #1 parameter

• ###update: db:update(collection, query, update, upsert, single, callback)

  • collection: Database collection name, required
  • query: mongodb query eg: { type: { $in: [ 'food', 'snacks' ] } } or just { type: "snacks" }, required
  • update: mongodb update, eg: { $set: { "detail": "14Q2" } }, required
  • upsert: if not find result with query params, insert a record with update params.
  • single: update multiple records or single record, boolean.
  • callback: function, without parameters

• ###remove (collection, query, single, callback)

  • collection: Database collection name, required
  • query: mongodb query eg: { type: { $in: [ 'food', 'snacks' ] } } or just { type: "snacks" }, required
  • single: remove multiple records or single, boolean.
  • callback: function, without parameters

• ###count (collection, query, callback)

  • collection: Database collection name, required
  • query: mongodb query eg: { type: { $in: [ 'food', 'snacks' ] } } or just { type: "snacks" }, required
  • callback: function, without parameters

• ###findOne: db:find(collection, query, fields, skip, callback)

  • collection: Database collection name, required
  • query: mongodb query eg: { type: { $in: [ 'food', 'snacks' ] } } or just { type: "snacks" }, required
  • fields: limit field for return, eg: { item: 1, qty: 1, _id:0 }
  • skip: skip counts, int
  • callback: function, without found document as #1 parameter

Test and example

See files in "test/" Folder

If you have any issue while use this library please let me know. thanks.

TODO:

• [x] Bit64 support
• [x] Bit32 support
• [x] Date type support
• [x] Cursor
• [x] Raw Command support
• [x] Write concern
• [ ] Auth
• [ ] Create index
• [ ] Get index
• [ ] Remove index

MIT

The MIT License (MIT)

Copyright (c) 2015 Cyril Hou<[email protected]>

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.