similar to: Nested One-To-Many ActiveRecord Question

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',

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

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 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

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

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

Hello, I have 2 tables table colors : +----------------------+ | id | user_id | name | +----------------------+ | 1 | 1 | test1 | | 2 | 2 | test2 | | 3 | 3 | test3 | +----------------------+ table users : +----------------------+ | id | enabled | name | +----------------------+ | 1 | 1 | bob | | 2 | 1

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 =>

How to make it work with paginator (kaminari)? MySQL and full text search: Words (id, word) @words = Word.find_by_sql(["SELECT id, word, MATCH (word) AGAINST (?) AS Score FROM words WHERE MATCH (word) AGAINST (?) ORDER BY Score Desc, word!=?", params[:search],params[:search],params[:search]]) I can''t add .page(params[:page]).per(5) to the end of "find_by_sql()" so

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

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 to all!! I am new to ruby. I am trying to write a program to fetch the data from Database and written the data using pagination. I could get the data from DB. but pagination is not working. When i see the log file it is showing the following error. NoMethodError: undefined method ''paginatior'' #<Hash...> my pginate.rb and pagination.rb files are not in the same folder

I have run into a very strange problem discovered through the use of the acts_as_taggable plugin, but related to quoting/sanitizing the interpolated list in a find_by_sql. Apologies for the length, but I wanted to be complete. ;-) The method from acts_as_taggable.rb is: def find_tagged_with(list) find_by_sql(["SELECT #{table_name}.* FROM #{table_name}, tags,