CoffeeScript Mongodb variable passing

Question

db.collection('database_name')
  .find( { 'active':true, 'iOS':true} )
  .toArray (err, dbDocs) ->

returns me a result set .

However,

deviceName = 'iOS'
db.collection('database_name')
  .find( { 'active':true, deviceName:true} )
  .toArray (err, dbDocs) ->

doesnt work.

deviceName is a coffeescript string variable initialized to iOS deviceName = 'iOS'

How do I pass the variable deviceName?

Thilo · Accepted Answer · 2012-10-29 11:10:31Z

3

You cannot use object literals if your field names are dynamic, you have to build the query object programmatically:

query = { active: true };
query[deviceName] = true if something;

db.collection('database_name').find( query ).toArray (err, dbDocs) ->

answered Oct 29, 2012 at 11:10

Thilo

264k107 gold badges527 silver badges674 bronze badges

Sign up to request clarification or add additional context in comments.

3 Comments

Raja Over a year ago

{ $and: [ { 'active':true }, {'platform': { $in : ['Android'] } } ] } If I have to build a query like above, and ['Android'] is a dynamic variable. How to go about it ?

Thilo Over a year ago

That's okay. Only dynamic field names are "tricky", for values you can use variables. { platform: { $in : anArrayVariable }}

Raja Over a year ago

db.collection('database_name').find( {$and: [ { active:true }, { platform: { $in : deviceName } } ] }).toArray (err, dbDocs) deviceName is an array for me and it will be populated at runtime.

Collectives™ on Stack Overflow

CoffeeScript Mongodb variable passing

1 Answer 1

3 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

3 Comments

Your Answer

Sign up or log in

Post as a guest

Related