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Questions tagged [virtual-attribute]

113 questions
25
votes
3 answers

What would a default getter and setter look like in rails?

I know that I can write attr_accessor :tag_list to make a virtual attribute tag_list for an object in Rails. This allows there to be a tag_list attribute in forms for the object. If I use attr_accessor :tag_list I can, in the model, perform actions…
jay
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11
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2 answers

Rails virtual attribute search or sql combined column search

I have a user model with attributes 'first' and 'last' So for example User.first.first #=> "Charlie" User.first.last #=> "Brown" This User model also has a virtual attribute 'full_name' #user.rb def full_name [first,last].join(' ') end def…
Nik So
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10
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3 answers

Rails 3: creating a validation with :if statement

Hi I'm trying to setup a validation that is only called in a specific form view, to do this I'm trying to create a hidden_field for a virtual attribute on the form and set this to a value, then validate :if the virtual attribute equals the…
trying_hal9000
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10
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1 answer

Virtual attributes in rails 4

How can I use virtual attributes(getter, setter) in rails 4, as 'attr_accessible' removed. I am getting issue, here def tags_list @tags = self.tags.collect(&:name).join(', ') end I can reach above method, but not able to reach setter…
Ashwin Yaprala
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9
votes
4 answers

In Yii framework how can I Combine columns and show as display string in dropdownlist

I have a dropDownList in my view, it is populating from clients table, the table contains columns like first_name, last_name,id etc., Now I want to show the first_name and last_name as display text and id as value in drop down list, I'm done with id…
arun
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6
votes
3 answers

Virtual attribute not moved to the model hash inside params

I'm having a problem in my Rails 3.2 app where a virtual attribute sent restfully via JSON is not in the right place in the params hash. Well, it isn't where I expect. It remains to be seen if my expectations are correct. :) I have a model using the…
Tetious
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6
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2 answers

Setting & getting virtual attributes in Rails model

I'm looking for a rails-y way to approach the following: Two datetime attributes in an Event model: start_at: datetime end_at: datetime I would like to use 3 fields for accessing them in a form: event_date start_time end_time The problem I'm…
Meltemi
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5
votes
3 answers

When to use a virtual attribute or pass data in a hash in Rails 3

In my application, I have a Widget model, a Feature model with a has_many through association by WidgetFeature table. As per the requirements, when I am sending a WidgetFeature object, I should append the feature_name to it as well, for the given…
user738184
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5
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1 answer

rails 3 find or create based on multiple fields

I am trying to implement a simple tagging system using a tag virtual attribute on a notes object. a tag contains a label and a user_id. what I would like to do is update the HABTM to relationship to the note based on what is in the tags field. I…
GSto
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5
votes
1 answer

Yii2 add related attribute to sort

I have normal ModelSearch with ActiveDataProvider, and I would like to add a virtual/related attribute to sorting in gridview. If I'm doing with setSort, and I'm adding this only attribute, then all other attributes are not sortable any more. Is…
user2511599
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4
votes
2 answers

Virtual attributes Rails - Unknown Attribute Error

I'm making a Rails 4 application. Each incident belongs to a user. Each incident has many events. I want that I can create an Incident with current_user.incidents.new and pass it an attribute message which exists in the Event model. On creation, I…
Umang Raghuvanshi
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4
votes
2 answers

Selecting Rails Models via Virtual Attributes

I have the two rails models Section & SectionRevision. A Section is mostly just a container that holds all the Revisions relating to itself. So most of the attributes for the Section are basically stored within the SectionRevision model so there's a…
Ryan King
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4
votes
3 answers

How can I add a derived column to my Yii model?

In Yii, I need to add a "derived" column to any resultset from my model. The column doesn't actually exist in the database table. For example, say I have an Activity model. There are only two types of Activities: (1) Income, or (2) Expense. If I…
Turgs
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3
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1 answer

Rails 3 config setting for attr_accessible/protected

I just spent quite some time trying to resolve a virtual attribute issue in my model. It turned out I'd simply forgotten to add it to attr_accesible in my model. Granted I should have caught it earlier or better should have started the whole…
Yuri
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3
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1 answer

Virtual attribute validation Rails 3

I have not done a whole lot with this Jquery-tokeninput or Rails virtual attributes but have been slamming my head against the wall with this one. Any help or guidance is appreciated. I have a virtual attribute reader in my announcement model which…
Yuri
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