Dwijendra Parashar

 1. go to db / migrations   2. find the specific migration number   3. $   rake db:migrate:down VERSION=20220728103647  4. change in the specific migration   5.  rake db:migrate:up VERSION=20220728103647

1. git checkout master  2. copy the code of database.yml and put at another place in sublime or anywhere  3. git checkout -b workflow  (the new branch) 4. paste the code of  database.yml previously taken in the database.yml  4. git pull origin master  5. close the database.yml  6. git pull origin master 

 git branch -a 

  r sir  - igb project mein scope hi scope banaye the humne  project tha 

  show do     attributes_table do       row :name       row :academic_year do |object|         if object&.academic_year.present?           link_to object&.academic_year&.year, "/admin/academic_years/#{object&.academic_year&.id}"         end       end     end     panel 'Academic Class' do       attributes_table_for academic_class.divisions do         row :id         row :title       end     end   end

 https://activeadmin.info/5-forms.html

 arvind sir discussion at meeting and rinku sir solve he ask  get the link from builder cd  pipeline  copy the line from seeds.rb chingching and paste it to console create api inside account controller   - accounts_controller.rb  def create_active_admin end creae roe for his mehod a roes.rb  postman par reqest bheji hai  before action except filrter lagaya 

 https://activeadmin.info/

 self.abstract_class = true ............................................................. require 'csv' ............................................................. csv ==  comma seperated values 

 psql -U postgres .................................................. generally there are two passwords of the postgres : root postgres  ... we can check the postgres password also 

Error :: StandardError: An error has occurred, this and all later migrations canceled: SQLite3::SQLException: table "users" already exists ................................................................................................................................................ 9 just run into the console rails console and type in ActiveRecord::Migration.drop_table( :users ) and then exit the console and rake db:migrate This method is successful :: this will work definately 51 If you create an empty migration by running: rails g migration DropInstalls or: rails generate migration DropInstalls You can then add this into that empty migration: class DropInstalls < ActiveRecord::Migration def change drop_table :installs end end Then run  rake db:migrate  in the command line which should remove the Installs table Note:  db/schema.rb  is an autogenerated file. To alter the db structure, you should use the migrations instead of attempting to edit th...

 class Removeemailfromusers < ActiveRecord::Migration[6.0]   def self.up      remove_column :users, :email, :string   end   def self.down      add_column :users, :email, :string   end end

  Use this command on the terminal: rails generate migration add_fieldname_to_tablename fieldname: string and rake db: migrate rails generate migration add__to_tablename fieldname: string

class AddDobToCustomer < ActiveRecord::Migration [ 5.2 ] def change add_column :customers , :dob , :date , after: :email end end

 controller ::    def import       csv_data = BxBlockFee::Fee.import(params[:file])       render json: {message: "Fee data is successfully Imported"}, status: :created     end     def export       csv_data = BxBlockFee::Fee.all       respond_to do |format|         format.csv { send_data csv_data.to_csv, filename: "Installment-#{DateTime.now}.csv" }       end     end route ::   namespace :bx_block_fee do     resources :fees, :only => [:index, :create, :update, :show, :destroy] do         post 'import', on: :collection         get 'export', on: :collection     end   end model :: module BxBlockFee class Fee < BxBlockFee::ApplicationRecord require 'csv' self.table_name = :fees validates :name, :valid_until, :amount, presence: true belongs_to :academic_account, clas...

     def filter       @taxes = BxBlockTax::Tax.all       if params[:name].present?          @taxes = @taxes.where(name: params[:name])       end       if params[:tax_start].present? && params[:tax_end].present?         @taxes = @taxes.where(tax_percentage: params[:tax_start]..params[:tax_end])       end         render json: TaxSerializer.new(@taxes, meta: {message: "Tax lists"}).serializable_hash, status: :ok     end

R sir do this 

Database .yml mein jo bhi name daloge woh application.yml mein bhi set karoge Note :: database.yml aur application.yml mein change krna hoga database import - i have to import new database which is given by rinku – that is local database 1. first the file given by rinku – download that 2. cut paste that to the normal folder of chingching 3. change the database name in application.rb and database.yml - ........................................................................................................................................ In database.yml - database: 'chingchingbyakon_dev1' , test - database: 'ChingChing_test1' ........................................................................................................................................ in application.yml - development - database: 'chingchingbyakon_dev1', test - database: 'ChingChing_test1', production: ‘chingchingbyakon_dev1’ ...........................................................

 1 give command model - rails g model FeeConcession fee_concession_id:string fee_concession_name:string valid_until:datetime fee_concession_amount:decimal mode:string  2 create route.rb -   namespace :bx_block_academic_account do     resources :academic_account   end 3 create controller - module BxBlockAcademicClass   class AcademicClassesController < ApplicationController     before_action :current_user     before_action :set_academic_class, only: [:update,:show, :destroy]     def index       academic_classes = AcademicClass.order("created_at DESC").paginate(page: params[:page], per_page: 10)       if academic_classes.present?         render json: AcademicClassSerializer.new(academic_classes, meta: {total_pages: academic_classes.total_pages, message: "Academic class lists"}).serializable_hash, status: :ok       else         render json...

 bundle exec rake db:migrate 

rake db:drop delete all migration files manually delete all other folders and files  rake db:create rake db:migrate  pull from another branch