arel
Rails 3 Returning All Columns from a Join
I\'m trying to join two tables and return all columns, not just the ones associated with the model. I have something like that looks like this开发者_如何学JAVA:[详细]
2023-01-27 09:14 分类:问答rails2 to rails3 upgrade problem
I am trying to upgrade my application from Rails 2.3.5 to Rails 3.0.3. Models: Project.rb has_many :project_roles, :dependent => :destroy[详细]
2023-01-26 20:46 分类:问答Why ARel query is returned as ActiveRecord::Relation class instead of parent class?
I have a class: class Technician < ActiveRecord::Base scope :named, lambda {|name| where([\"first_name LIKE ?\", \"%#{name}%\"])}[详细]
2023-01-26 16:30 分类:问答Rails 3 and Acl9: find all subjects for a given object/role
I\'m using rails3 with acl9 for authorization. I\'m trying to grok ARel and the rails way of querying.[详细]
2023-01-26 00:19 分类:问答How to override :order defined in a has_many
I have class Authors has_many :books, :order => \'name ASC\' I am trying to query all the books sorted by name DESC[详细]
2023-01-25 17:48 分类:问答Is it possible to get the ActiveRecord::Relation object for an association
Do association methods, such as those defined by has_many and belongs_to utilize ActiveRecord::Relation?[详细]
2023-01-25 04:38 分类:问答Nested queries using Arel (Rails3)
For example, I have 2 models: Purchase (belongs_to :users) User (has_many :purchases) I want to select all users that have at least one purchase.[详细]
2023-01-23 21:28 分类:问答Concatenate (glue) where conditions by OR or AND (Arel, Rails3)
I have several complex queries (using subqueries, etc...) and want to glue them together with OR or AND statement.[详细]
2023-01-23 14:27 分类:问答Find your way up the polymorphic tree to one parent
I have a simple polymorphic association #comment.r开发者_JAVA百科b belongs_to :commentable, :polymorphic => true[详细]
2023-01-21 20:06 分类:问答Rails 3 Query Interface: using associated models
I\'ll use the generic blog example. class Post < ActiveRecord::Base has_many :comments end class Comment < ActiveRecord::Base[详细]
2023-01-20 18:59 分类:问答