Rails: Object creation with has_many / belongs_to association

Question

There are two models Task and Project. A Project has many 'Task's and a 'Task' belongs_to a `Project'.

class Task < ActiveRecord::Base belongs_to :project end class Project < ActiveRecord::Base has_many :tasks end

A list of all Tasks is displayed as a separate page for each Project and displays your Tasks.

How to create the condition for the method create, so that the Task be able to be created as an independent object, and associated with the Project?

My knowledge was only enough to write two separate methods.

To create associated objects:

def create @project = Project.find(params[:project_id]) @task = @project.tasks.create(task_params) redirect_to project_path(@project) end

To create a separate object:

def create @task = current_user.tasks.new(task_params) respond_to do |format| if @task.save format.html { redirect_to @task, notice: 'Task was successfully created.' } format.js {} format.json { render json: @task, status: :created, location: @task } else format.html { render action: "new" } format.json { render json: @task.errors, status: :unprocessable_entity } end end end

How to do it one method?

On what conditions, you want to create as independent? , If there is no Project for the project_id passed? — BinaryMee
– BinaryMee, Commented Feb 23, 2016 at 10:07

froderik · Accepted Answer · 2016-02-23 10:07:17Z

1

You have to pass in the project_id to your second method. Then you can add

@task.project_id = params[:project_id]

or something like that. If tasks always belongs to projects you may want to model them as a nested resource.

answered Feb 23, 2016 at 10:07

froderik

4,8283 gold badges36 silver badges44 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

BinaryMee Over a year ago

His question is to create task, with/without Project on the same method.

froderik Over a year ago

I had a hard time getting the question but it seems the questioneer was happy with the answer at least!

Alexandr Dmitrenko · Accepted Answer · 2016-03-04 15:03:10Z

Task Controller:

def index @tasks = Task.all @task = Task.new end def create @task = if params[:project_id] @project = Project.find(params[:project_id]) @project.tasks.build(task_params) else Task.new(task_params) end ...

Project Model:

class Project < ActiveRecord::Base has_many :tasks, dependent: :destroy accepts_nested_attributes_for :tasks, :allow_destroy => true end

and in projects controller

private def project_params params.require(:project).permit(:name, ....., taks_attributes: [:id, .....,:_destroy]) end

Collectives™ on Stack Overflow

Rails: Object creation with has_many / belongs_to association

2 Answers 2

2 Comments

Comments

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

2 Comments

Comments

Related