CODEWITHSUNDEEP
ruby-on-railsarraysruby
Sangwoo Park
Sangwoo Park

Reputation: 125

ruby on rails: how to delete element by column value at model array

Model Cafe has meal_available, which has boolean type.

When searching cafe, I want to re-search by category checkbox:

<form action="/cafe/cafesearch" method="GET">
<label for="chk1"><input type="checkbox" id="chk1" name="meal_available" value=true>meal_available</label>
<input type="submit" value="submit">
</form>

At view, pass checkbox value through form tag, and at controller, I tried like this:

coffee = Cafe.all
if params[:meal_available] == true
  @cafe = coffee.delete_if{|x| x.meal_available == false}
end

It didn't work. How can I delete element by model column in array?

Upvotes: 0

Views: 443

Answers (2)

Ilya
Ilya

Reputation: 13487

You can use ActiveRecord methods for it only:

if params[:meal_available] == true
  @cafe = Cafe.where(meal_available: false)
end

In this case coffee = Cafe.all is redundant.

coffee = Cafe.all
if params[:meal_available] == true
  @cafe = coffee.select { |x| x.meal_available == false }
end

Upvotes: 0

sghosh968
sghosh968

Reputation: 601

You can just put in a scope in Cafe model to get the cafes with meal_available, more information on ActiveRecord scopes here

In cafe model :

class Cafe < ActiveRecord::Base
  scope :meals_available, -> { where(meal_available: true) }
end

In controller :

@cafes = Cafe.meals_available

thats it, thanks.

Upvotes: 1

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