Show info from table wich is joined

Ruby
1

Hi,

<% @user.email %>
…is working

<% @user.educations do |education| %>

  • <%= education.name%>

    • …is NOT working.

    This is because there is a join-table involved…below the mirgation

    class AddTableEducationsUsers < ActiveRecord::Migration
    def self.up
    create_table :educations_users do |t|
    t.column :education_id, :integer
    t.column :user_id, :integer

    end
    add_index “educations_users”, “education_id”
    add_index “educations_users”, “user_id”

    end
    def self.down
    drop_table :educations_users
    end
    end

    I want on the user-page the occupations of the user…any suggestions??

    remco

    2

    Did you setup the AR models?

    User
    has_many :education

    Education
    belongs_to :user

    3

    Jacob Basham wrote:

    Did you setup the AR models?

    User
    has_many :education

    Education
    belongs_to :user

    Hi Jacob,

    My models are…

    User
    has_and_belongs_to_many :educations

    Education
    has_and_belongs_to_many :users

    Because a user can have many educations and eductions can have many
    users.

    remco

    4

    On Nov 7, 2007 12:22 PM, Remco S. [email protected] wrote:

    users.
    Are you trying to move away from the DB relational model (i.e. you
    plan to alter the DB), or just trying to get Ruby to work with it?

    By the sound of it, you have something in the DB that looks like
    (forgive the crude notation)…

    Users ← Expertise → Educations

    3 tables?

    Todd

    5

    Todd B. wrote:

    On Nov 7, 2007 12:22 PM, Remco S. [email protected] wrote:

    users.
    Are you trying to move away from the DB relational model (i.e. you
    plan to alter the DB), or just trying to get Ruby to work with it?

    By the sound of it, you have something in the DB that looks like
    (forgive the crude notation)…

    Users ← Expertise → Educations

    3 tables?

    Todd

    I have 3 tables

    users
    educations
    educactions_users

    The educactions_users is my join table, with the columns users_id and
    educations_id.

    A part of the user-edit-view looks like this, where the user can
    specified there educations. This works…after getting grey hair!!

    educations

    <% for education in Education.find(:all) %>
    <%= check_box_tag "user[education_ids][]", education.id, @user.educations.include?(education) %> <%= education.name%>
    <% end %>

    But…

    In the show-view i want a list of educations wich the user has selected.
    I thought this.

    Educations

      <% @user.educations do |education| %>
    • <%= education.name%>
      • <% end %>

    This get empty value…

    This is my problem…

    Grtz…remco

    6

    On Nov 7, 2007 1:18 PM, Remco S. [email protected] wrote:

    Users ← Expertise → Educations

    @user.educations.include?(education) %>

    Have you tried specifying the word “through” in your rails models.
    This works for me, for example…

    class User < ActiveRecord::Base
    has_many :memberships
    has_many :groups, :through => :memberships
    end

    class Group < ActiveRecord::Base
    has_many :memberships
    has_many :users, :through => :memberships
    end

    class Membership < ActiveRecord::Base
    belongs_to :user
    belongs_to :group
    end

    hth a little,
    Todd