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Rails 5 All topic Notes

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Manish Sakariya

The document provides notes on Rails including how to generate a new Rails project, controller, and model, how to perform migrations to create or modify database tables, how to configure the database and routes, and an overview of how the Rails framework handles requests using controllers to interface with models and the database and return responses. It also defines CRUD as an acronym for create, read, update, and delete operations on data and describes Active Record as a layer that maps business objects to database tables.

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RAILS-5.0 NOTES/CHEATSHEET Manish Sakariya -India
1) Browser sends request to server for the html page 2) Router routes the request To the controller of the Demanded page. 3) A) Controller checks if page Is available in the view. if yes then send page back to the server 4) Controller sends requested page to server 3) B) else controller takes data from database using model and send to the view. page is created in the view based on the data.
 1) Generate new Rails project (type inside console) Rails new project_name -d database example: Rails new myapp –d MYSQL Extra info…. 1) then-> cd myapp 2) then-> bundle install 3) bundle exec command to check why command is not working]  2) Generate new controller (type inside console) Rails g controller controller_name methodnames..(optional) example: Rails g controller wecome index  3) Generate new model (type inside console) Rails g model model_name columnatme:datatype… example: Rails g model name:string password:string
 4) Generate migration ( type inside controller) A) Rails g migration migrationname (simple migration) Example: rails g migration createtable B) Rails g migration AddXXXToYYY ( Add column in the table) Example: rails g migration AddDateToEmployee C) Rails g migration RemoveXXXFromYYY (Remove column from the table) Example: rails g migration RemoveDateFromEmployee 5) Go to config/database.yml file. Then set database name , username , password and mysql socket name rake Db:schema:dump rake db:migrate (will create or modify table according to migration) 6) Go to config/route.rb file. And place universal matching pattern match ‘controller(/:action(/:id))’ , :via => :get 7) To start rails server : Rails server To stop rails server : ctrl+c
Controller Active Record Database **CRUD** Response Query Return data or error **CRUD** full form C=CREATE | R=READ|U=UPDATE|D=DELETE Active Record is a layer of the system which facilitates the creation and use of business objects whose data requires persistent storage to a database

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Rails 5 All topic Notes

  • 2. 1) Browser sends request to server for the html page 2) Router routes the request To the controller of the Demanded page. 3) A) Controller checks if page Is available in the view. if yes then send page back to the server 4) Controller sends requested page to server 3) B) else controller takes data from database using model and send to the view. page is created in the view based on the data.
  • 3.  1) Generate new Rails project (type inside console) Rails new project_name -d database example: Rails new myapp –d MYSQL Extra info…. 1) then-> cd myapp 2) then-> bundle install 3) bundle exec command to check why command is not working]  2) Generate new controller (type inside console) Rails g controller controller_name methodnames..(optional) example: Rails g controller wecome index  3) Generate new model (type inside console) Rails g model model_name columnatme:datatype… example: Rails g model name:string password:string
  • 4.  4) Generate migration ( type inside controller) A) Rails g migration migrationname (simple migration) Example: rails g migration createtable B) Rails g migration AddXXXToYYY ( Add column in the table) Example: rails g migration AddDateToEmployee C) Rails g migration RemoveXXXFromYYY (Remove column from the table) Example: rails g migration RemoveDateFromEmployee 5) Go to config/database.yml file. Then set database name , username , password and mysql socket name rake Db:schema:dump rake db:migrate (will create or modify table according to migration) 6) Go to config/route.rb file. And place universal matching pattern match ‘controller(/:action(/:id))’ , :via => :get 7) To start rails server : Rails server To stop rails server : ctrl+c
  • 5. Controller Active Record Database **CRUD** Response Query Return data or error **CRUD** full form C=CREATE | R=READ|U=UPDATE|D=DELETE Active Record is a layer of the system which facilitates the creation and use of business objects whose data requires persistent storage to a database