Question

Have a query that is failing because the scope is running a query like this :'%'email'%'
The internal quotes are causing the problem, how can I get rid of them?

user.rb (User Model)
#it's checking a text field to see if it contains the email address
@locations = Location.has_permission(self.email)

location.rb (Location Model)
scope :has_permission, lambda { |email| where("locations.permissions LIKE '%?%'",email)}

Answer 1

Your scope should be building the pattern using string concatenation:

scope :has_permission, lambda { |email| where("locations.permissions LIKE '%' || ? || '%'",email)}

|| is the string concatenation operator in SQL so the following:

'%' || ? || '%'

In Ruby, ends up the same as:

'%' + email + '%' 

This is a question of style, wrapping the email address in percents in Ruby (either with + or interpolation) yields the same result in the end. Perhaps I’m just more comfortable with SQL than a lot of Rails people.