Question

Im new to rails and I want to make a select query based on diffrent GET params (filtering and sorting). Can I some how add conditions to find in the code?

For example:

if params[:ratings] 
  Movie.where(:rating => params[:ratings].keys)
end

and then add ordering and other where conditions. How can I achive this? Maybe there is a better way to dybamicly modify select query (without making SQL string).
Thanks.

Answer 1

The where, order, … methods return ActiveRecord::Relation objects so you can keep calling more query methods:

query = Movie
if(params[:ratings])
  query = query.where(:rating => params[:ratings].keys)
end
if(params[:some_order_param])
  query = query.order(params[:some_order_param])
end
# Keep adding more 'where', 'order', 'group', ... methods as needed ...
results = query.all