TypeError: wrong argument type String (expected Array)

Question

I am trying to execute following line in rails console (bundle exec rails c):

query = select("product.id").where("admin_id = ? and account_id = ?", 3, 4)

But I get following error:

TypeError: wrong argument type String (expected Array)
from (irb):83:in `select'

This code seems to be working fine in the application as such. Any clue on why it is failing in irb?

ruby version -> 1.9.3p545
Rails version -> 3.2.8

This code is originally defined in a ActiveRecord class (Product) in a scope. How to execute it through rails console ?

irb or rails console. Also what context are you executing it in. It seems you want to call it in a context of some ActiveRecord class, you are missing a receiver here. — BroiSatse
– BroiSatse, Commented Jun 4, 2014 at 12:44

BroiSatse · Accepted Answer · 2014-06-04 12:48:56Z

5

You haven't specified the receiver for select, hence it tries to execute select method defined on Kernel module. In your application this call is wrapped within some class, which becomes a default receiver. You need to add this receiver to your call in irb, most likely:

query = Product.select("product.id").where("admin_id = ? and account_id = ?", 3, 4)

Update:

Since this is defined as a scope, you can just use scope name to execute it:

query = Product.scope_name

answered Jun 4, 2014 at 12:48

BroiSatse

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