search for: table_a

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', ...

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 89089 ...... Table_B: Email Name Sex Phone abc at gmail.com John Chan M 0909 khn...

...t; an_id, code, ... Models: class TableB < AR::Base set_table_name ''table_b'' set_primary_key :an_id # singular PK belongs_to :code_name, :class_name=>''TableA'', :primary_key=>:pk_code_name, :foreign_key=>:code SELECT = "*, table_a.name AS pk_name" def self.get_all all(:select=>SELECT, :joins=>:code_name) end end class TableA < AR::Base set_table_name ''table_a'' set primary_keys :type_key, :code_key # using the composite primary keys gem 2.3.2 def self.fi...

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 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...

...A instance, i also need to create an empty Table B instance. I tried to incorporate this into the model for Table A using various callbacks, after_create, after_save, before_create. Trying to set the table_b attribute to a new Table B instance and have table_b''s foreign key be the id the table_a object being created. However, i kept running into exceptions "undefined method ''construct_sql''. I checked my dev log and saw there was an INSERT query for table_b just after table_a''s INSERT, which is what i wanted. But it dies right after. Why is that? So do i n...

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 =>

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. D...

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 ActiveRecord::Ba...

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

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 @table_a = value end...

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 89089 ...... Table_B: Email Name Sex Phone abc at gmail.com<ma...

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. Regards, Madana -- View this message in context: http://r.789695.n4.nabble.com/SQL-query-with-Multicore-option-on-R-linux-tp4643771.html Sent from the R help mailing list archive at...

...e 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 <-"http://www.zam.com/forum.html?forum=21&p=2" table_a <- readHTMLTable(a, header = TRUE, which = 1, stringsAsFactors = FALSE) but, this website gives me an error - b <-"http://www.mmo-champion.com/forums/266-General-Discussions/page2" table_b <- readHTMLTable(b, header = TRUE, which = 1, stringsAsFactors = FALSE) Error in functi...

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

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

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 or may not exist, and tab...

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

Hi, Is it possbile that one active record maps to N tables, actually the relation is 1 to 1, I wonder it is possible. also can a ruby object map to N tables, instead of an active records? Thanks you very much:) Saiho __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

Is it possible to specify that certain tables not be cleared on each example. I''ve inherited a project where a good amount of enumerated data is stored in the database (US States, statuses, about 15-20 tables worth. Over all, it''s a reasonable decision that leads to solid production code (acts_as_enumerated is good). This data is read-only and relatively static; any