similar to: ActiveRecord and refreshing column info

Hi, I'll coded your example into R code: Table_A <- c('abc at gmail.com', 'John Chan', '0909') Table_A <- rbind(Table_A, c('bcd at yahoo.com', 'Tim Ma', '89089')) colnames(Table_A) <- c('Email', 'Name', 'Phone') Table_A Table_B <- c('abc at gmail.com', 'John Chan', 'M',

I have a set of one-to-many relationships, nested 4 deep. In other words: table_A has_many table_B, table_B belongs_to table_A, has_many table C, table_C belongs_to table_B, has_many table D, table_D belongs_to table_C Now, I want to to find on table_A, based on criteria in table_D, and I want to paginate it. And I need fields from all four tables in the result set. Does anyone know

I have a legacy db with the following simplified structure: Table-A: type_key, code_key, name, ... # PKs are type_key and code_key, there is no id col and I cannot alter this db Table-B: # each row has only the code as a foreign_key, the type_key is hard-coded to "FOOKEY" an_id, code, ... Models: class TableB < AR::Base set_table_name ''table_b''

I''m trying to be a good rails developer and fix DRY violations as i find them. However, i''m trying to fix this one, i cant seem to get it to work. I have two tables A and B that have a one-to-one relationship. Table B belongs_to Table A. Table A has_one Table B. I''m creating instances of Table A in different places, depending on the controller. However, for each

Hello, I currently have two tables. table_a ( id table_b_id other_attrs ) table b ( id name ) So table A holds an id from table B. During the listing of tuples in table A, it lists table A''s attributes. In place of the table B id, I check the id, and instead display the name corresponding to that id. Now I want to be able to sort the listing of tuples in table A by the

Thanks - Peter, Eivind, Rui Sorry, I perhaps could not explain it properly in the first go. Trying to simplify it here with an example - Say I have two dataframes as below that are NOT equally-sized data frames (i.e., number of columns are different in each table): Table_A: Email Name Phone abc at gmail.com John Chan 0909 bcd at yahoo.com Tim Ma

Thanks, Peter, Eivind and Lui Sorry, I could not explain it properly in the first go. Trying to simplify it here with an example - Say I have two dataframes as below that are not equally-sized data frames: Table_A: Email Name Phone abc at gmail.com<mailto:abc at gmail.com> John Chan 0909 bcd at yahoo.com<mailto:bcd at yahoo.com> Tim Ma

Hi, We have worked on a problem of connection: Connect to two databases with a single ActiveRecord::Base model class within the same action The main difficulty is how to disconnect the actual connection properly and then let the ActiveRecord establishes a new one. The actual function "remove_connection" removes the connection, but its doesn''t unbind the link between rails and

Hi, I''m trying to create a "runtime-generic" ActiveRecord class, It means I don''t need to know the table or database, before I create my program ruby-rails. So I don''t need to predefine my database in environment.yml file and pre-build classes inherited from ActiveRecord::Base. I write some code, it seems to work. However, I can''t disconnect my

Hello everyone, Here''s my problem for the day: I have three tables that look a little like the following table_a id table_b id position table_a_id name table_c id table_a_id table_b_position There will be many rows in table_c that have the same table_a_id, and the same table_b_position. These will all be referencing the same name value in table_b. The row in table_b may

Hi R experts, I have been playing with library(XML) recently and found out that readHTMLTable workls flawlessly for some website, but it does give me an error like below ... Error in function (classes, fdef, mtable) : unable to find an inherited method for function "readHTMLTable", for signature "NULL" let's say..for example, this code works fine a

I''m using a find with a :joins clause, like this: :joins => "JOIN table_b ON table_b.id=table_b_id" The records returned are used in a scaffold generated list page. The edit, show, and destroy links are getting the wrong id. They are getting the id of the table b record. When I run the query using mysql, I see that the query returns *2* id columns, the id of the main

Can I map 2 tables into one class? Is there any pattern, e.g. using ActiveRecord aggregation? Thanks Szczepan -------------- next part -------------- An HTML attachment was scrubbed... URL: http://wrath.rubyonrails.org/pipermail/rails/attachments/20060103/fa2aed7c/attachment.html

Hello, I have recently upgraded to the 0.8.2 release of rSpec, and I am receiving the following message with each view spec execution: WARNING: there is no transaction in progress I have upgraded the rspec_on_rails plugin as well, and both the model and controller tests are working flawlessly. Is there some simple step I missed? thanks for the input. -Chris -------------- next part

Dear friends, I ran the following in my console.Assume I already have the postgresql connection . >> class D < ActiveRecord::Base >> end => nil >> D.set_table_name "users" => nil >> D.column_names => ["id", "name", "fname", "lname", "password", "addr1", "addr2",

I just took my HABTM and turned it into a :through since my join table has another "non-joiny" attribute. I went from this: has_many_and_belongs_to :jobs, :join_table => ''tablename'', :foreign_key => ''x'', :association_foreign_key => ''y'' to this: has_many :jobs, :through =>

To speed up <%= @project.members_count %> , I added a counter cache to the ''projects'' table with the migration below: def self.up add_column "projects", "members_count", :string, :default => "0" Project.reset_column_information Project.find(:all).each do |p| p.update_attribute :members_count , p.members.count

How do you tell if an foreign key attribute has been changed? For example, lets say you have a model with attribute table_a_id. Would you do this? def table_a_id=(value) if value != table_a_id @table_a_changed = true write_attribute ''table_a_id'', value end end def table_a=(value) if value != table_a @table_a_changed = true

http://bugzilla.mindrot.org/show_bug.cgi?id=127 ------- Additional Comments From djm at mindrot.org 2003-01-07 17:13 ------- This fix is incorrect - the creds (which are often supplemental groups) need to be restablished after initgroups(), which we call elsewhere. Does the PAM module not support restablishing credentials? ------- You are receiving this mail because: ------- You are the

So I have this fairly basic migration bit of code class AddCounterCache < ActiveRecord::Migration def self.up add_column ''products'', ''backlog_items_count'', :integer, :default => 0 end def self.down remove_column ''products'', ''backlog_items_count'' end end What I want to do in that is automatically