Question

From this input: {‘hearing’ => 1} I need to generate this query

Score.joins(:target_disability).where{ (target_disabilities.name == 'hearing') & (round(total_score) >= 1) }

From this input is {‘hearing’ => 1, ‘mobility’ => 2}, I need to generate this:

Score.joins(:target_disability).where{ (target_disabilities.name == 'hearing') & (round(total_score) >= 1) | (target_disabilities.name == 'mobility') & (round(total_score) >= 2) }

And so on…

How can this be generalized? Because my input sometimes has 3 or 4 keys… sometime 1…

Answer 1

Assuming your hash is in my_params:

@scores = Score.joins(:target_disability).where do
    my_params.map{|k,v| (target_disabilities.name==k) & (round(total_score)>=v) }.inject(:|)
end