rails-activerecord
Easy Ruby on Rails question -- how to attach comments to both users and articles?
I realize that this is probably a very basic question, but I have spent days coming back to it now and for some reason Google just isn\'t helping me. (I think part of the problem is that I\'m such a b[详细]
2023-02-20 15:32 分类:问答before_update syntax
post.rb Model after_update :assign_owner def assign_owner开发者_运维问答 self.owner = \"test\" end[详细]
2023-02-19 19:58 分类:问答unable to determine row count Ruby-On-Rails
im trying to build a cart in ruby on rails it requires me to show the output like this : You have 3 items in your cart (3 being the number of items in my cart) and im trying to find the number of rows[详细]
2023-02-18 12:23 分类:问答Rails ActiveRecord: validate single attribute
Is there any way I can validate a single attri开发者_运维问答bute in ActiveRecord? Something like:[详细]
2023-02-06 16:00 分类:问答Rails 3 datatypes?
Where can I find a list of data types that can be used in rails 3? (such as text,开发者_StackOverflow社区 string, integer, float, date, etc.?) I keep randomly learning about new ones, but I\'d love to[详细]
2023-02-03 22:30 分类:问答Understanding :source option of has_one/has_many through of Rails
Please help me in understanding the :source option of has_one/has_many :through association. The Rails API explanation makes very little sense to me.[详细]
2023-02-03 08:25 分类:问答How to express a NOT IN query with ActiveRecord/Rails?
I\'m hoping there is a easy solution that doesn\'t involve find_by_sql, if not then I guess that will have to work.[详细]
2023-01-28 00:44 分类:问答ActiveRecord, Postgres and partitioned tables
I\'ve set up a trigger-based partitioning scheme on one of our pg 8.3 databases 开发者_如何学运维according to the pg docs here:. Basically, I have a parent table, along with several child tables. An i[详细]
2023-01-26 20:39 分类:问答How do you delete an ActiveRecord object?
How do you delete a开发者_StackOverflow中文版n ActiveRecord object? I looked at Active Record Querying and it does not have anything on deleting that I can see.[详细]
2023-01-25 14:36 分类:问答What's the Rails way to access the previous record in a series?
Say I have a Statement model, which has_many :months. There are always 12 months associated with a statement, but the first month can vary (eg months = [Mar, Apr, May...Jan, Feb])[详细]
2023-01-24 02:38 分类:问答