Skip to content

HTTPS clone URL

Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP
A fork of the one on BitBucket
Haskell
branch: master

Fetching latest commit…

Cannot retrieve the latest commit at this time

Failed to load latest commit information.
src/Snap/Snaplet Cleaned files a bit
.gitignore
LICENSE
README
Setup.hs
snaplet-mongoDB.cabal
snaplet-mongoDB.cabal~

README

Snap Framework support for MongoDB as Snaplet

Depends on Snap 0.7.* and <others>

Based on work of Massive Tactical

Their MongoDB helper package ( mostly used with Yesod ) is there:
https://github.com/MassiveTactical/mt-mongodb

Usage ( assuming you've used snap init to layout your app ):

In Application.hs:
```Haskell
import Snap.Snaplet.MongoDB
```

then add mongoDB snaplet to App state:
```Haskell
data App = App
    { _heist :: Snaplet (Heist App)
    , _mongoDB :: Snaplet MongoDBSnaplet
    ...
```

then make App an instance of HasMongoDBState:
```Haskell
instance HasMongoDBState App where
  getMongoDBState = with mongoDB Snap.get
  setMongoDBState s = undefined -- with mongo $ puts s
```

next in Site.hs ( in app = ...):
```Haskell
m <- nestSnaplet "mongoDB" mongoDB $ mongoDBInit (host "localhost") 12 "my_db"
```
and don't forget to pass this "m" to your App data constructor..

... and voila!

Now you've got "withDB" function which "lifts" your Handler Monad
so You can use db functions ( as described at mt-mongodb pages ).

ex:
```Haskell
some_handler :: Handler App App ()
some_handler = do
  ret <- withDB $ select [mongo| {} |][limit 10]
  case ret of
    ...
```
Something went wrong with that request. Please try again.