showell215 / koa-mongo-router

KOA Router REST API for MongoDB

KOA REST API Router for MongoDB

A router that exposes a standard REST API for a MongoDB.

Status: BETA-1

1. Usage
2. Mongo Routes
3. Query String

Usage

npm install koa-mongo-router

import { getMongoRouter } from './mongo-router'

// Example permission check function
async function permissionCheck(ctx: Koa.Context, next: () => Promise<any>, database: string, collection: string) {
    // Assumes you have middleware that already adds a user
    if (ctx.state.user == undefined) {
        ctx.status = 401
        return
    }

    // Example of validating if a user has read or write permissions
    switch (ctx.Method) {
        case 'GET':
            if (!ctx.state.user.canRead(database, collection)) {
                ctx.status = 403
                return
            }
            break

        case 'PUT':
        case 'POST':
        case 'PATCH':
        case 'DELETE':
            if (!ctx.state.user.canWrite(database, collection)) {
                ctx.status = 403
                return
            }
            break
    }

    // If user haas permission for method, then continue on
    await next()
}

const mongoRouter = getMongoRouter({
    permissionCheck
})

const app = new Koa()
    .use(mongoRouter.routes())
    .use(mongoRouter.allowedMethods())

Mongo Routes

Method	Route	Description	Notes
GET	/:database/:collection	Get items	Query String
POST	/:database/:collection	Create an item
PUT	/:database/:collection	Create or replace items	Query String Filtering
PATCH	/:database/:collection	Update items	Query String Filtering
DELETE	/:database/:collection	Delete items	Query String Filtering
GET	/:database/:collection/:id	Get an item
PUT	/:database/:collection/:id	Create or replace an item
PATCH	/:database/:collection/:id	Update an item
DELETE	/:database/:collection/:id	Delete an item

Get Items

Get items from a collection. Items can be filtered, paged, sorted, and counted using query string parameters.

Request	Parameters	Notes
Method	GET
Path	/:database/:collection
Returns	An array of items
Codes	200 Success
	304 Not Modified	Conditional GET

Create An Item

Create a new item. This creates a new _id and assigns it to the item.

Request	Parameters
Method	POST
Path	/:database/:collection
Body	The item to create
Returns	The id of the created item
Status Codes	201 Created

Create Or Replace Items

Create or replace items.

Request	Parameters
Method	PUT
Path	/:database/:collection
Body	An array of items
Status Codes	200 OK

Update Items

Update items.

Request	Parameters
Method	UPDATE
Path	/:database/:collection
Body	The patch for the items
Status Codes	200 OK

Delete Items

Delete items.

Request	Parameters
Method	DELETE
Path	/:database/:collection
Status Codes	200 OK

Get An Item

Get an item.

Request	Parameters
Method	GET
Path	/:database/:collection/:id
Status Codes	200 OK
	404 Not Found

Get Or Replace An Item

Get or replace an item.

Request	Parameters
Method	PUT
Path	/:database/:collection/:id
Body	The item
Status Codes	200 OK
	201 Created

Update An Item

Update an item.

Request	Parameters
Method	PATCH
Path	/:database/:collection/:id
Body	The patch for the item
Status Codes	200 OK
	404 Not Found

Delete An Item

Delete an item.

Request	Parameters
Method	DELETE
Path	/:database/:collection/:id
Status Codes	200 OK
	404 Not Found

Query String

Query String Options

Option	Description	Example
$limit	Limit the number of items	?$limit=10
$skip	Skip the given number of items	?$skip=20
$fields	Return only specified fields	?$fields=name,description
$sort	Sort on specified fields	?$sort=name,-description
$count	Return the total count header	?$count
$paginate	Return pagination header	?$paginate

Query String Filtering

Operation	Query String
field exists	?foo
field does not exist	?!foo
field equals	?foo=bar
field does not equal	?foo!=bar
field greater than	?foo>10
field less than	?foo<10
field greater than or equal to	?foo>=10
field less than or equal to	?foo<=10
field equals any of	?foo=bar&foo=baz
field does not equal any of	?foo!=bar&foo!=baz
field contains case-insensitive string	?foo~=bar
field starts with case-insensitive string	?foo^=bar
field ends with case-insensitive string	?foo$=bar
record exists	?!