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How to remove an object from the ActiveRecord::Relation object


By : leonardo12
Date : October 18 2020, 06:10 AM
this will help CarStatusDefinition.where.not(keyword: "USED") will filter out all the CarStatusDefinition with keyword USED
code :


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Using the Map function to remove a object from an activerecord::relation


By : 김영찬
Date : March 29 2020, 07:55 AM
With these it helps If I understand clearly you want only the completed checklists
Basically you must return the checklist when it's true and nil when it's not, then eliminate the nils in resulting array with compact... which is the work of select
code :
checklists.map do |checklist| 
  # ....
  checklist unless not_completed
end.compact
checklists.select do |checklist| 
  # ....
  !not_completed
end

Is there any before_update hook for an activerecord object if the object in the child relation is saved and touch is set


By : AKHIL M
Date : March 29 2020, 07:55 AM
To fix this issue I have , Try this before_update :update_popularity
Update:

ActiveRecord Relation: append objects inside the ActiveRecord::Relation Object


By : iCeDev
Date : March 29 2020, 07:55 AM
I wish this helpful for you If someone has a better way of doing this I would love to know.
I got it to do what I wanted to do by appending to a regular array, and then before returning it, I transformed it into an activerecord::relation so that I could use activerecord methods on it. It would be nice If I could do the whole thing with the same activerecord::object:
code :
locations = []
if true
  #append onto that locations array all the location objects that are partner locations
  locations = locations + Location.partner_locations
end
if true
  #append onto that locations array all those location objects those locations that are education locations
  locations = locations + Location.education_locations
end
return Location.where(id: locations.map(&:id)).order(:name)

Append an ActiveRecord::Relation object with single ActiveRecord object


By : user6933928
Date : March 29 2020, 07:55 AM
I hope this helps . I need to append a single ActiveRecord object onto a loaded ActiveRecord::Relation. , As a temporary fix, I have done the following:
code :
books = Book.where(author: User.find(params[:user_id])).pluck(:id)
books << Book.find_by_name("One More Book").id
@books = Book.where(id: books)

How can I remove and return the first element in an ActiveRecord relation object?


By : Arxic
Date : March 29 2020, 07:55 AM
I hope this helps you . I want to remove and return the first element in an AR relation object. I used shift, but it does not remove the object. , You can pretty easily turn it into an array first.
i.e.
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