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Rails how to improve if record exists?


Rails how to improve if record exists?

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Rails how to improve if record exists?
Tag : ruby-on-rails , By : George Handlin
Date : November 25 2020, 07:06 PM


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Rails 3 Improve Active Record Query Performance


Tag : ruby-on-rails-3 , By : Frank Rotolo
Date : March 29 2020, 07:55 AM
I wish this help you Hi I have the following query : , Maybe something like this?
Player.joins(:results).where("results.win = true AND results.competition_id = 4").order("results.count DESC")

rails, deleting record if exists with a same column value before creating a new record


Tag : ruby-on-rails , By : smbrant
Date : March 29 2020, 07:55 AM
To fix this issue your logic is complicated enough to not be built into a framework, you can do what you need in either controller or model, just find the photo you want to replace, destroy it if it exists and create new one
photo = person.photos.where(kind: "face").first
photo.destroy if photo

# procede with creating new photo object

Rails - what is the most efficient way to create record or update it (if the record exists)?


Tag : mysql , By : bdurbin
Date : March 29 2020, 07:55 AM
hope this fix your issue Try find_or_create_by (http://apidock.com/rails/v4.0.2/ActiveRecord/Relation/find_or_create_by).
record = GoldenResult.find_or_create_by( platform_id: platform_id, 
         release_id: release_id, configuration_id: configuration_id ) do |record|
  # fill in additional data for a new record if needed
end

Rails 4 ActiveRecord, if record exists, use id, else create a new record


Tag : ruby-on-rails , By : PPD
Date : March 29 2020, 07:55 AM
around this issue When an employee is created, he is given a title. If the title is unique, the record saves normally. If the title is not unique, I want to find the existing title, and use that instead. I can't figure out how to do this in the create action. , What you need to do is to change this:
def create
  if EmployeeTitle.exists?(name: employee_params[:title_attributes][:name])
    # find title and use it?
  else
    @employee = current_user.employee.build(employee_params)
  end
  if @employee.save
    flash[:success] = "Employee #{@employee.title.name} created."
    redirect_to @employee
  else
    render 'new'
  end
end
def create
  @employee = current_user.employee.build(employee_params)
  if @employee.save
    flash[:success] = "Employee #{@employee.title.name} created."
    redirect_to @employee
  else
    render 'new'
  end
end
def title_attributes=(attributes)
  self.title = EmployeeTitle.find_or_create_by_name(attributes[:name])
end
EmployeeTitle.find_or_create_by(name: attributes[:name])

Rails: Record Exists Rollback when Record doesn't exist


Tag : ruby-on-rails , By : Eric
Date : March 29 2020, 07:55 AM
this one helps. I am guessing it is most likely an issue with either:
A) Validations in your models (remove them all and test again) - if it works add them once at a time and you figure out what validation caused the rollback.
validates :username, presence: true, uniqueness: { case_sensitive: false }
def user_params
  params.require(:user).permit(:first_name, :last_name, :email, :username, :password_digest, :_destroy)
end 
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