Hi All, Ok, I've got a bit of an odd situation (as if none of my others were...). Basically I have a setup where there are 4 entities: Sites -> Buildings -> Meters -> Values I then have a fifth entity (Charts) that creates reports on the Values. I have a request to allow for Charts to be visually associated with any of those items ...
I have two models, TreeNode and User. Each user has_one TreeNode, which is the root of the tree. class TreeNode acts_as_tree belongs_to :user end class User has_one :tree_node end I would like to have this setup so that rails will make the association so that I can do something like User.first.tree instead of User.first.t...
Hi there, I'm trying to create an association between two models using join conditions rather than a foreign key. Does anyone know if this is possible? For example I want to join products to pricing points. A product has a price and a pricing point has a minimum and maximum amount and a name. Eg. Min = 0, Max = 20, Name = Less than $20...
Hey everyone! I was wondering; what is the best open source software that I can use for non-binary association rule generations. I need a non-binary implementation because converting my currently non-binary data to binary data would not give the desired results. Thanks and can't wait to here your comments! ...
Hey Everyone, I am trying to generate a set of association rules out of a set of data using WEKA. I have converted my .csv file to an .arff file that is usable by WEKA. Once in the software I remove all string fields form the data set and convert everything to nominal data. My problem is when I go to the association rules and try to ge...
Here's my situation: I have 2 person objects, person1 and person2, which were created from two different external data sources. I have a manual process that I use that has determined that person1 and person2 actually refer to the same person, so what I want to do is "merge" them into a single person, and remove the duplicate. I have ...
I have a weird situation involving the need of a double inner join. I have tried the query I need, I just don't know how to make rails do it. The Data Account (has_many :sites) Site (habtm :users, belongs_to :account) User (habtm :sites) Ignore that they are habtm or whatever, I can make them habtm or has_many :through. I want to b...
I am implementing a contest system in which the user has to choose the correct answer of multiple questions. Each week, there is a new set of questions. I am trying to find the correct way to store the user participations in a database. Right now I have the following data model: Participation Week +--------------+ ...
Since has_one doesn't provide a before_add callback to allow validation, how do I prevent rails from destroying the old association even when the new one does'nt pass validation? susan :has_one :shirt shirt :belongs_to :susan susan.shirt = a_nice_shirt this destroys whatever association was present beforehand, even if the new shirt is...
I've pastied the specs I've written for the posts/show.html.erb view in an application I'm writing as a means to learn RSpec. I am still learning about mocks and stubbing. This question is specific to the "should list all related comments" spec. What I want is to test that the show view displays a post's comments. But what I'm not ...
I have four tables: jp_properties, cn_properties, jp_dictionaries and cn_dictioanries. And every jp_property belongs to a jp_dictionary with foreign key "dictionary_id" in table. Similarly, every cn_property belongs to a cn_dictionary with foreign key "dictionary_id" in table too. Since there are a lot of same functions in both proper...
I am a fan of using mocks and stubs everywhere I can to keep my specs running quickly. I'm kind of stumped as to how I might do this to test the find_special method in the following: has_many :foos do def find_special if proxy_owner.baz ... find stuff else ... find other stuff end end end ...
Hello, user (has_many :user, has_many :comments) post (belongs_to :user, has_many :comments) comment (belongs_to :user, belongs_to :post) Now I am trying to retrieve all posts (having atleast one comment of the user) updated with comments from last comment of user in that post (i will be using user's updated_at attribute for this) Exa...
Hello everybody! On my iPhone, I'm running an app called Caissa Chess. After registering the app with the manufacturer (this is optional) I received an email, containing a chess puzzle. The crucial part of the mail message, showing a chess diagram looks like this: <a href="chess://puzzle/8/p1R3p1/4p1kn/3p3N/3Pr2P/6P1/PP3K2/8 w ?term=w2...
Hi, I am using multiple child models in a complex form (a la http://railsforum.com/viewtopic.php?id=28447). The form works great, but I need to validate a property of the set of child models before accepting the form data into the database. I've come up with one mostly-working, very-kludgy way of doing this. Seems like there has to be a...
When using the new accepts_nested_attributes_for in ActiveRecord, it's possible to use the option :allow_destroy => true. When this option is set, any hash containing nested attributes like {"_delete"=>"1", "id"=>"..."} passed to update_attributes will delete the nested object. Simple setup: class Forum < ActiveRecord::Base has_many ...
Hi, I want to something like the following: @user.update_attributes(:name => "Obama", :profile => { :current_location => 'US' }) where User has_one profile. ...
In this document (scroll down to the Unidirectional section): http://docs.jboss.org/hibernate/stable/annotations/reference/en/html_single/#entity-mapping-association-collections it says that a unidirectional one-to-many association with a join table is much preferred to just using a foreign key column in the owned entity. My question i...
hi, I have two models, user and group. I also have a joining table groups_users. I have an association in the group model: has_many :groups_users has_many :users, :through=> :groups_users I would like to add pending_users which would be the same as the users association but contain some conditions. I wish to set it up as an associatio...
I cannot seem to get a nested form to generate in a rails view for a belongs_to relationship using the new accepts_nested_attributes_for facility of Rails 2.3. I did check out many of the resources available and it looks like my code should be working, but fields_for explodes on me, and I suspect that it has something to do with how I ha...