api program methods in rails

 class Api::V1::FactsController < ApplicationController

before_action :find_fact,only: [:show, :update, :destroy]

def index 

@facts = Fact.all

render json: @facts

end 

def show

render json: @fact

end 

def create

@fact = Fact.new(fact_params)

if @fact.save 

render json: @fact

else 

render error: {error: 'Unable to create fact'},status: 400 

end

end 

def update

if @fact 

@fact.update(fact_params)

render json: {message: 'Fact successfully updated.'},status: 200

else

render json: {error: 'Unable to update fact.' },status: 400

end

def destroy

if @fact 

@fact.destroy

render json: {message: 'Facts successfully destroyed'},status: 200

else

render json: {error: 'Unable to delete fact'},status:400

end

end

private 

def fact_params

params.require(:fact).permit(:fact, :likes, :user_id)

end

def find_fact

@fact = Fact.find(params[:id])

end 

end