How to use find_or_create in create action? - ruby-on-rails

Question

I want to use find_or_create method in my game dates controller. I don't know how to use that method in create action, when params are in game_date_params. Any suggestion how can I extract date from game_date_params?
class GameDatesController < ApplicationController
before_action :authenticate_user!
before_action :authenticate_admin
def index
#game_dates = GameDate.all
#showcases = Showcase.joins(:game_dates)
end
def new
#game_date = GameDate.new
#game_date.referee_stats.build
end
def create
#game_date = GameDate.new(game_date_params)
if #game_date.save
redirect_to showcases_path
flash[:success] = "Game date created"
else
render 'new'
end
end
def show
#game_date = GameDate.find(params[:id])
end
def destroy
#game_date = GameDate.find(params[:id]).destroy
redirect_to root_url
flash[:success] = "Game date deleted"
end
private
def game_date_params
params.require(:game_date).permit(:date, referee_stats_attributes: [ :games_count, :showcase_id ])
end
This is output from POST action:
Started POST "/game_dates" for 127.0.0.1 at 2016-04-01 10:21:44 +0200
Processing by GameDatesController#create as HTML Parameters:
{"utf8"=>"✓",
"authenticity_token"=>"jmuOmMCO/WTFIkxrsw5l2cPVMqZAl7h11f281I+OyoHH3ddwKoB9ANAqvQEHulR88c7fzQXnnIaxs8FChMCjqw==",
"game_date"=>{"date(1i)"=>"2016", "date(2i)"=>"4", "date(3i)"=>"1",
"referee_stats_attributes"=>{"0"=>{"games_count"=>"4",
"showcase_id"=>"1"}}}, "commit"=>"Create Game date"} User Load
(0.5ms) SELECT "users".* FROM "users" WHERE "users"."id" = $1 ORDER
BY "users"."id" ASC LIMIT 1 [["id", 1]] GameDate Load (0.4ms)
SELECT "game_dates".* FROM "game_dates" WHERE "game_dates"."date" IS
NULL LIMIT 1 (0.2ms) BEGIN SQL (0.4ms) INSERT INTO "game_dates"
("date", "created_at", "updated_at") VALUES ($1, $2, $3) RETURNING
"id" [["date", "2016-04-01"], ["created_at", "2016-04-01
08:21:44.864669"], ["updated_at", "2016-04-01 08:21:44.864669"]] SQL
(0.4ms) INSERT INTO "referee_stats" ("games_count", "showcase_id",
"game_date_id", "created_at", "updated_at") VALUES ($1, $2, $3, $4,
$5) RETURNING "id" [["games_count", 4], ["showcase_id", 1],
["game_date_id", 7], ["created_at", "2016-04-01 08:21:44.866897"],
["updated_at", "2016-04-01 08:21:44.866897"]] (18.1ms) COMMIT
Redirected to http://localhost:3000/showcases Completed 302 Found in
31ms (ActiveRecord: 20.1ms)

Answer 1

GameDate.find_or_create_by(game_date_params) would find record with ALL game_date_params, so you could do this by finding with specific params like date and assign rest of attributes to it via block. for example:
def create
# find or initialize the record
#game_date = GameDate.find_or_initalize_by(date: game_date_params[:date]) do |game_date|
# Accept nested attributes as well
game_date.assign_attributes(game_date_params)
end
if #game_date.save
redirect_to showcases_path
flash[:success] = "Game date created"
else
render 'new'
end
end
See also: find_or_create_by and AttributesAssignment API docs

Answer 2

It should be like :
def create
#game_date = GameDate.find_or_create_by(game_date_params)
if #game_date.present?
redirect_to showcases_path
flash[:success] = "Game date created"
else
render 'new'
end
end

Answer 3

Create action is for creating an object after the new action has been called and update action if the same but for edit. Mixing create & update logic i not a good idea. Maybe you should rethink what are you trying to do in your views.