render :json and associations

rubyonrails-talk
1

Is there any way to use the to_json includes when using "render :json"?

I've got this:

format.json { render :json => { :order => @orders } }

But I'd also like to include the address (order.address) association. The "to_json" method has all these options, but I don't see how I can use that with render :json. If I tack on the to_json to @orders the render :json escapes the whole thing. I'm using Ext JS on the client side.

Thanks!

2

Is there any way to use the to_json includes when using "render :json"?

I've got this:

format.json { render :json => { :order => @orders } }

render :json => @orders.to_json(...)

Fred

3

use eager loading on your @orders with :include option or use :select to add attributes from address if you only need limited data from address and performance is a concern.

Regards,

rp8

4

This works, but what if I want to add other json object that aren't in orders? Ext JS needs a "count" param for it's client side pagination. So I originally had this:

format.json { render :json => { :order => @orders, :count => @orders.size } }

I couldn't figure out how to use to_json in this situation.

5

I do have includes on the finder, but the associates are not sent with the json output.

For now I wound up just building my own hash and returning that.

6

This works, but what if I want to add other json object that aren't in orders? Ext JS needs a "count" param for it's client side pagination. So I originally had this:

format.json { render :json => { :order => @orders, :count => @orders.size } }

format.json { render :json => { :order => @orders, :count => @orders.size }.to_json }

Fred