Databases
StackOverflow2013
Postsdbo
POMongoid namespaced models and inheritance
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POMongoid namespaced models and inheritance
    primarykey
    data
    text
    <p>I'm trying the use namespaced models with Mongoid and can't seem to get it to work.</p> <p>I have the following models: Achievement, Flag, FlagCaptured</p> <p>Achievment is the base class for FlagCaptured.</p> <p>app/models/achievement.rb</p> <pre><code>class Achievement include Mongoid::Document include Mongoid::Timestamps::Created belongs_to :team end </code></pre> <p>app/models/flag.rb</p> <pre><code>class Flag include Mongoid::Document field :name, :type =&gt; String field :key, :type =&gt; String, :default =&gt; SecureRandom.base64 field :score, :type =&gt; Integer belongs_to :achievement, :class_name =&gt; "Achievements::FlagCaptured" validates :name, :presence =&gt; true, :uniqueness =&gt; true validates :key, :presence =&gt; true, :uniqueness =&gt; true validates :score, :presence =&gt; true, :numericality =&gt; { :only_integer =&gt; true } def captured? !achievement_id.nil? end end </code></pre> <p>app/models/achievements/flag_captured.rb</p> <pre><code>module Achievements class FlagCaptured &lt; Achievement has_one :flag, :foreign_key =&gt; :achievement_id, :autosave =&gt; true def score self.flag.score end end end </code></pre> <p>I create the FlagCaptured achievement in the console like so:</p> <pre><code>Achievements::FlagCaptured.create(:flag =&gt; Flag.first, :team =&gt; Team.first) </code></pre> <p>Now the achievement will be created and I can get it with:</p> <pre><code>Achievements::FlagCaptured.first </code></pre> <p>However, neither side of the relation is set.</p> <p>So</p> <pre><code>Achievements::FlagCaptured.first.flag </code></pre> <p>is nil</p> <p>and</p> <pre><code>Achievements::FlagCaptured.first.flag_id </code></pre> <p>gives a NoMethodError.</p> <p>Further both:</p> <pre><code>Flag.first.achievement Flag.first.achievement_id </code></pre> <p>are nil.</p> <p>What is going on here? I've tried everything I can think of (setting the foreign keys, specifying the class names, specifying the inverse relation) and nothing works. :(</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USSeth Jackson
    1. USSeth Jackson
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POMongoid namespaced models and inheritance
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. POMongoid namespaced models and inheritance
      1. USErich
      1. VTFavorite
    1. COshouldn't `class FlagCaptured < Achievement` be `class Achievements::FlagCaptured < Achievement`
      singulars
      1. POMongoid namespaced models and inheritance
      1. USrubish
    2. COYes. I forgot to put that in my example code above. Sorry.
      singulars
      1. POMongoid namespaced models and inheritance
      1. USSeth Jackson
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload