Join query

hello i am new in ruby on rails…i will want to know how we write
join query in ruby on rails,and how we define relationship
between two tables in ruby on rails…(like belongs_to,has_many etc)
can anyone provide simple code or url,its urgent…

Subhadip Chakraborty wrote:

hello i am new in ruby on rails…i will want to know how we write
join query in ruby on rails,and how we define relationship
between two tables in ruby on rails…(like belongs_to,has_many etc)
can anyone provide simple code or url,its urgent…

At some point, you need to break down and actually “READ” something on
Ruby on Rails… there are a bazillion tutorials out there that walk
through the basics, including parent-child relationships and how to use
them…

Table name: projects

id :integer(11) not null, primary key

proj_name :string(30) default(""), not null

proj_desc :string(60)

proj_text :text

class Project < ActiveRecord::Base
has_many :scenarios
end

Table name: scenarios

id :integer(11) not null, primary key

scen_name :string(30) default(""), not null

scen_text :text

project_id :integer(11)

class Scenario < ActiveRecord::Base
belongs_to :project
end

A Project claims to have many Scenarios.
A Scenario has an element project_id, hence the scenarios for a project
can be found because the Scenario has a field called project_id which
points to its parent.

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