rails generate model

Question

I m trying to follow instructions from the book  Head First Rails  and on page 50 it says to create a model but I am unable to create a model using the rails command   When I type this at this prompt  localhost   home    rails generate model ad name string description text price decimal seller id integer email string img url string   I get this   Usage    rails new APP PATH  options   Options    -r   --ruby PATH                 Path to the Ruby binary of your choice                                    Default   Users home  rvm rubies ruby-1 9 3-p125 bin ruby   -b   --builder BUILDER           Path to a application builder  can be a filesystem path or URL    -m   --template TEMPLATE         Path to an application template  can be a filesystem path or URL         --skip-gemfile              Don t create a Gemfile        --skip-bundle               Don t run bundle install   -G   --skip-git                  Skip Git ignores and keeps   -O   --skip-active-record        Skip Active Record files   -S   --skip-sprockets            Skip Sprockets files   -d   --database DATABASE         Preconfigure for selected database  options  mysql oracle postgresql sqlite3 frontbase ibm db sqlserver jdbcmysql jdbcsqlite3 jdbcpostgresql jdbc                                     Default  sqlite3   -j   --javascript JAVASCRIPT     Preconfigure for selected JavaScript library                                    Default  jquery   -J   --skip-javascript           Skip JavaScript files        --dev                       Setup the application with Gemfile pointing to your Rails checkout        --edge                      Setup the application with Gemfile pointing to Rails repository   -T   --skip-test-unit            Skip Test  Unit files        --old-style-hash            Force using old style hash   foo   gt   bar   on Ruby  gt   1 9  Runtime options    -f   --force       Overwrite files that already exist   -p   --pretend     Run but do not make any changes   -q   --quiet       Suppress status output   -s   --skip        Skip files that already exist  Rails options    -h   --help        Show this help message and quit   -v   --version     Show Rails version number and quit  Description      The  rails new  command creates a new Rails application with a default     directory structure and configuration at the path you specify       You can specify extra command-line arguments to be used every time      rails new  runs in the  railsrc configuration file in your home directory       Note that the arguments specified in the  railsrc file don t affect the     defaults values shown above in this help message   Example      rails new   Code Ruby weblog      This generates a skeletal Rails installation in   Code Ruby weblog      See the README in the newly created application to get going  localhost   home     I am using Rails -v 3 2 8 and Ruby 1 9 3p125

User · Answer

For me what happened was that I generated the app with rails new rails new chapter_2 but the RVM --default had rails 4.0.2 gem, but my chapter_2 project use a new gemset with rails 3.2.16.

So when I ran

rails generate scaffold User name:string email:string

the console showed

Usage:
   rails new APP_PATH [options]

So I fixed the RVM and the gemset with the rails 3.2.16 gem , and then generated the app again then I executed

 rails generate scaffold User name:string email:string

and it worked

User · Answer

The code is okay but you are in the wrong directory  You must run these commands inside your rails project-directory   The normal way to get there from scratch is     rails new PROJECT NAME   cd PROJECT NAME   rails generate model ad       name string        description text       price decimal       seller id integer       email string img url string

User · Answer

The error shows you either didn t create the rails project yet or you re not in the rails project directory   Suppose if you re working on myapp project  You ve to  move to that project directory on your command line and then generate the model  Here are some steps you can refer   Example  Assuming you didn t create the Rails app yet     gt  rails new myapp   gt  cd myapp   Now  generate the model from your commandline      gt  rails generate model your model name

User · Answer

You need to create new rails application first  Run  rails new mebay cd mebay bundle install rails generate model       And try to find Rails 3 tutorial  there are a lot of changes since 2 1 Guides  http   guides rubyonrails org getting started html  are good start point

[ruby-on-rails] rails generate model

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