Rails not including attribute in SQL Query even though specified - ruby-on-rails

Question

Despite providing the name, the SQL query clearly shows that it's not being passed properly. Rails console doesn't require any whitelist parameters as far as I'm aware, but I've included my controller as well.
Query in rails console: Profession.first.skills.create(name: 'rails')
Profession Load (0.5ms) SELECT "professions".* FROM "professions" ORDER BY "professions"."id" ASC LIMIT $1 [["LIMIT", 1]]
(0.2ms) BEGIN
Skill Exists (0.4ms) SELECT 1 AS one FROM "skills" WHERE "skills"."name" = $1 LIMIT $2 [["name", "twitter"], ["LIMIT", 1]]
SQL (1.0ms) INSERT INTO "skills" ("profession_id", "created_at", "updated_at") VALUES ($1, $2, $3) RETURNING "id" [["profession_id", 1], ["created_at", "2017-12-18 12:22:11.154775"], ["updated_at", "2017-12-18 12:22:11.154775"]]
(0.1ms) ROLLBACK
Not sure what's going on here.
Validation errors are still working though...
Valid object:
:027 > Skill.new(name: "rails", profession: Profession.first).valid?
Profession Load (0.4ms) SELECT "professions".* FROM "professions" ORDER BY "professions"."id" ASC LIMIT $1 [["LIMIT", 1]]
Skill Exists (1.9ms) SELECT 1 AS one FROM "skills" WHERE "skills"."name" = $1 LIMIT $2 [["name", "twitter"], ["LIMIT", 1]]
=> true
Name being detected for validations:
:020 > Skill.create!(name: String.new, profession: Profession.first)
Profession Load (0.4ms) SELECT "professions".* FROM "professions" ORDER BY "professions"."id" ASC LIMIT $1 [["LIMIT", 1]]
(0.1ms) BEGIN
Skill Exists (0.4ms) SELECT 1 AS one FROM "skills" WHERE "skills"."name" = $1 LIMIT $2 [["name", ""], ["LIMIT", 1]]
(0.1ms) ROLLBACK
ActiveRecord::RecordInvalid: Validation failed: Name can't be blank
from (irb):20
Max Length:
:023 > Skill.create!(name: "sjadfkahskdfkjsahdfkjaskjdfkjhsdjkfhksajhfjksahasdljflasjdlfkjaskldjflkasjdklfjklasjdklfjlasjdflkjasklfjsdfhkjsahkjdfhjkasdhfkjhkj", profession: Profession.first)
Profession Load (0.4ms) SELECT "professions".* FROM "professions" ORDER BY "professions"."id" ASC LIMIT $1 [["LIMIT", 1]]
(0.2ms) BEGIN
Skill Exists (0.3ms) SELECT 1 AS one FROM "skills" WHERE "skills"."name" = $1 LIMIT $2 [["name", "sjadfkahskdfkjsahdfkjaskjdfkjhsdjkfhksajhfjksahasdljflasjdlfkjaskldjflkasjdklfjklasjdklfjlasjdflkjasklfjsdfhkjsahkjdfhjkasdhfkjhkj"], ["LIMIT", 1]]
(0.3ms) ROLLBACK
ActiveRecord::RecordInvalid: Validation failed: Name is too long (maximum is 50 characters)
from (irb):23
ProfessionsController
class ProfessionsController < ApplicationController
def new
#profession = Profession.new
end
def create
#profession = Profession.find_by(name: profession_params[:name])
skill_params = get_nested_params(profession_params, :skills_attributes)
if #profession
# Save skill under existing profession
#skill = Skill.create(name: skill_params[:name], profession_id: #profession.id)
else
#profession = Profession.new(name: profession_params[:name])
if #profession.save {
saved_profession = Profession.find_by(name: profession_params[:name])
saved_profession.skills.create(name: "twitter")
# Skill.create(name: skill_params[:name], profession_id: Profession.find_by(name: profession_params[:name])).save!
}
end
end
respond_to do |format|
if #profession.save || #skill.save
format.js { render layout: false }
format.html { redirect_back fallback_location: root_path, notice: 'Profession was successfully created.' }
else
format.html { redirect_back fallback_location: root_path, notice: 'Skill was not created.' }
end
end
end
private
def profession_params
params.require(:profession).permit(:name,
skills_attributes: [:id,
:name,
:starting_date,
:profession_id,
:_destroy])
end
def get_nested_params parent_params, nested_params
nested_attrs = parent_params[nested_params]
nested_attrs[nested_attrs.keys[0]]
end
end
Updated:
Error from controller when using saved_profession.skills.create(name: "twitter")
Started POST "/professions" for 127.0.0.1 at 2017-12-19 01:50:50 +1300
Processing by ProfessionsController#create as JS
Parameters: {"utf8"=>"✓", "profession"=>{"name"=>"software", "skills_attributes"=>{"1513601431887"=>{"name"=>"rails", "_destroy"=>"false"}}}, "commit"=>"Create Profession"}
Profession Load (0.3ms) SELECT "professions".* FROM "professions" WHERE "professions"."name" = $1 LIMIT $2 [["name", "software"], ["LIMIT", 1]]
(0.1ms) BEGIN
Profession Exists (0.3ms) SELECT 1 AS one FROM "professions" WHERE "professions"."name" = $1 LIMIT $2 [["name", "software"], ["LIMIT", 1]]
SQL (0.3ms) INSERT INTO "professions" ("name", "created_at", "updated_at") VALUES ($1, $2, $3) RETURNING "id" [["name", "software"], ["created_at", "2017-12-18 12:50:50.202270"], ["updated_at", "2017-12-18 12:50:50.202270"]]
Profession Load (0.2ms) SELECT "professions".* FROM "professions" WHERE "professions"."name" = $1 LIMIT $2 [["name", "software"], ["LIMIT", 1]]
Skill Exists (0.3ms) SELECT 1 AS one FROM "skills" WHERE "skills"."name" = $1 LIMIT $2 [["name", "twitter"], ["LIMIT", 1]]
SQL (0.7ms) INSERT INTO "skills" ("profession_id", "created_at", "updated_at") VALUES ($1, $2, $3) RETURNING "id" [["profession_id", 4], ["created_at", "2017-12-18 12:50:50.205484"], ["updated_at", "2017-12-18 12:50:50.205484"]]
(0.1ms) ROLLBACK
Completed 500 Internal Server Error in 8ms (ActiveRecord: 2.2ms)
ActiveRecord::NotNullViolation (PG::NotNullViolation: ERROR: null value in column "name" violates not-null constraint
DETAIL: Failing row contains (11, null, 2017-12-14, 4, 2017-12-18 12:50:50.205484, 2017-12-18 12:50:50.205484, null).
: INSERT INTO "skills" ("profession_id", "created_at", "updated_at") VALUES ($1, $2, $3) RETURNING "id"):
app/controllers/professions_controller.rb:21:in `block in create'
app/controllers/professions_controller.rb:18:in `create'

Answer 1

Try modifying your get_nested_params as:
def get_nested_params(parent_params, nested_params)
parent_params # For logging purpose only
# => {"name"=>"software", "skills_attributes"=>{"1513601431887"=>{"name"=>"rails", "_destroy"=>"false"}}}
nested_params # For logging purpose only
# => :skills_attributes
nested_attrs = parent_params[nested_params]
# => {"1513601431887"=>{"name"=>"rails", "_destroy"=>"false"}}
nested_attrs.values[0] # Return this
# => {"name"=>"rails", "_destroy"=>"false"}
end