activerecord

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Rails multiple fields to one model attribute

I have been looking everywhere but can\'t seem to find a good solution for this. My form has a date (textfield with datepicker) and a time (textfield with timepicker), which I want to map to an model[详细]

2023-04-11 23:47 分类：问答
Delayed Job Rails 3 undefined method 'up'

I\'m trying to resurrect a project from a few months ago using Rails 3.0.7. I had delayed job working on it previously, but now Ive updated my gems I get the following error when I try and enqueue s[详细]

2023-04-11 20:00 分类：问答
Efficient query for distinct count and group with two columns

Given a simple model that consists of descriptions, tags, and some other fields The results should be:[详细]

2023-04-11 19:02 分类：问答
Sorting / Grouping records for pagination with many association-based restrictions

I\'m working on an application which acts as a places directory and (currently, but 开发者_StackOverflowmaybe not always) allows filtering of a particular businesses\' venues based upon 1 city, 1 neig[详细]

2023-04-11 18:38 分类：问答
Active record query in rails with conditional join

I have models Category and Deal and having has_many :through mapping via categories_deals. I have a another model, City, which ha开发者_高级运维s a has_many :through mapping via cities_dealswith dea[详细]

2023-04-11 14:30 分类：问答
Using check boxes with a has_many relationship

I have an invoice with some lines. A line can only belong to one invoice. This is how my schema looks like:[详细]

2023-04-11 12:07 分类：问答
insert column in with same value as primary key

is possible in Rails, to insert row and to assign value of id to specific column, e.g. if i have table which have ID and LINK columns where LINK is link to same table:[详细]

2023-04-11 09:26 分类：问答
What is Object::private and Object::public in Ruby?

What are these methods and how bad is it to override them? irb(main):001:0> Object::respond_to?(\'private\', true)[详细]

2023-04-11 09:04 分类：问答
Getting a nested object collection trough Active Record

I am tryin开发者_如何学Gog to retrieve a list of object trough active record with no success I have a model which is: Store has many Products, Product has one Supplier[详细]

2023-04-11 06:27 分类：问答
How to delete on cascade on Rails 2

I have this DB design: contracts id name allotment id name contract_id allotments开发者_运维技巧_rooms[详细]

2023-04-11 05:34 分类：问答

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activerecord

Rails multiple fields to one model attribute

Delayed Job Rails 3 undefined method 'up'

Efficient query for distinct count and group with two columns

Sorting / Grouping records for pagination with many association-based restrictions

Active record query in rails with conditional join

Using check boxes with a has_many relationship

insert column in with same value as primary key

What is Object::private and Object::public in Ruby?

Getting a nested object collection trough Active Record

How to delete on cascade on Rails 2

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