I want to implement a method that checks if a model\'s instance has only nil or empty attributes, except from its id or timestamps.
I\'m having a problem understanding the after_save rails callback. There is a snippet from my model:
Given following model: rails g model Menu name:string rails g model MenuHeader mh_name:string menu_id:integer
I am trying to get a list of the events with name \"Party\". I also have a list of all of the events, which works fine. So I put this in my pages_controller:
In other words, can any complex sql statement (non-db specific SQL code) be broken up into constituent ActiveRecord statements? For the sake of the 开发者_运维技巧argument, I am not considering perfor
I have a user model. Users can have 1 of 3 roles: role1, role2, role3. This is represented by a \'role\' column in the user model.
I use rails 2.3.11 and on my prod machine I got this exception. In my dev machine It worked fine, Bascially Iam submitting a textarea with huge content and the column \'message\' in my db is of type t
I have a page that lists all the events in my database of events. I want to create a button that says \"my events\" that when pressed reloads the page but then only displays events that belong to the
I recently wrote ParseResource, which is a Ruby API wrapper for Parse.com\'s REST api. Here\'s a some basic usage:
class PersonAddress < ActiveRecord::Base end I would like to fetch only the PersonAddress ids (primary keys) using a ActiveRecord query, how should I do that, something similar to PersonAddres开发
加载中,请稍侯......