similar to: belongs_to without referencing an id as a foreign key?

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

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

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

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

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

Let''s say I want to find out what column names exist in two tables, table_a and table_b. One way I''ve been doing this is using ActiveRecord and the column info it returns. After establishing a connection for ActiveRecord, I do the following: ActiveRecord::Base.set_table_name("table_a") column_names_a = ActiveRecord::Base.column_names

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 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

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

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 =>

Hi, May I please ask how I do the following in R. Sorry - this may be trivial, but I am struggling here for this. For two dataframes (A and B), I wish to identify (based on a primary key-column present in both A & B) - 1. Which records (rows) of A did not match with B, and 2. Which records of B did not match with A ? I came across a setdt function while browsing, but when I tried

Hi all, I have the following sql query that I am executing on a machine with single core. I want to know how can I execute the same sqery on a maching that is running with 4 cores. Please provide me the code. NEW_TABLE <- rhive.query("SELECT A, B, COUNT(C) FROM TABLE_A WHERE A>='01-01-2012'") Also let me know how can I leverage only 2 / 3 cores of the machine.

Hi I just did an update to lates trunk ================= context "Given a generated venue_spec.rb with fixtures loaded" do fixtures :venues specify "fixtures should load two Venues" do Venue.should have(2).records end end ================== gives me ========== 1) TypeError in ''Given a generated venue_spec.rb with fixtures loaded fixtures should load two

Hello, Is there a common way of stripping html tags from a string? Right now I''m just calling gsub!(/<.*?>/, ''''), but with a background in PHP and always having used its strip_tags() method, I wonder if the Rails community has standardized this fairly common task with something a bit less simpleminded than my quick fix. Thanks! Zack -------------- next part

I have 3 tables keywords (keywords attached to a file) files (info about the file) paths (path for the file) [This is a legacy database, so I can''t change this] keyword belongs_to file and file belongs_to path. Users need to be able to search the keywords, but they only have access to certain volumes, so the results need to be limited by the path. I also need to show paging,

I am writing some specs that use ActiveMerchant to talk to a cc provider. When I try to "include ActiveMerchant::Billing" in my spec, it tells me it can''t find the plugin: ./activesupport/lib/active_support/dependencies.rb:123:in `const_missing'': uninitialized constant ActiveMerchant (NameError) Do I need to explicity require the main plugin file? Thanks, Mike Pence