Displaying 20 results from an estimated 900 matches similar to: "help with DRY violation"
2010 Aug 19
1
Composite primary keys and :joins=>
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''
2018 May 02
0
Merging dataframes
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',
2018 May 02
2
Merging dataframes
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
2006 Aug 15
1
sorting attribute in list from foreign table
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
2006 Jan 03
3
Can I map 2 tables into one class
Can I map 2 tables into one class?
Is there any pattern, e.g. using ActiveRecord aggregation?
Thanks
Szczepan
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2007 Mar 15
5
rake spec:views no transaction error
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
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2006 Jul 10
10
has_many :through and foreign key parameters
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 =>
2005 Dec 20
7
wrong id for activerecord object when using :joins in mysql
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
2012 Jun 14
1
readHTMLTable function - unable to find an inherited method ~ for signature "NULL"
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
2006 Mar 15
4
[NQ] How to set an initial FK for a new item of something?
Hi all,
running into a little problem here. I''ve a list of things
with a "New thing" link beneath it. When you click that link,
obviously, a new thing shall be created. Now, that works pretty
fine for things that don''t have foreign keys, but for things that
do it crashes, since there is not yet a thing.other_thing.name
available.
I suspect you can somewhere in
2018 May 01
4
Merging dataframes
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
2006 Mar 21
0
Nested One-To-Many ActiveRecord Question
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
2006 May 08
0
ActiveRecord and refreshing column info
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
2006 Mar 16
4
Table Relationships Problems.
I have the following tables setup:
locations
:id
:name
systemmessages
:id
:name
systemmessage_validtimes
:id
:name
:systemmessage_id
:location_id
:start
:end
The systemmessage_validtimes has a ''has_many'' relationship with
systemmessages, meaning that there could be many valid times for each
system message.
@systemMessage = Systemmessage.find(1)
E.g. I
2006 May 31
0
belongs_to without referencing an id as a foreign key?
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
2006 Feb 22
9
acts_as_habtm_list plugin
I''d like to announce acts_as_habtm_list plugin for rails.
acts_as_habtm_list is a Ruby on Rails plugin, that can manage ordered
lists through a join-table. It is providing almost the same Api as
acts_as_list. The position column has to be defined in the join table.
You can find additional information at:
http://www.inlet-media.de/acts_as_habtm_list/
Install it executing this command
2006 Jan 16
3
routing to controller inside module
Hey,
am i to stupid to find the information about how to route to a
controller in a module? Maybe module support has gone!
The controller is under:
app/controllers/admin/my_controller.rb
The my_controller.rb file looks like this:
module Admin
class MyController
def index
render :text => ''Hello!''
end
end
end
How does a route to all controllers under module
2018 May 02
0
Merging dataframes
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
2006 Mar 04
4
Submitting data to two different tables with two different models
I''m very new to Rails. I''ve been reading Agile Web Dev for a while and read
up on ruby, but I''m still learning.
I designed a website for someone for an engineering shop. New projects had
to be added manually.
Well, I figured this would be a great canidate for railifying! I have the
form working perfectly, you can add your data and get it in a table, and
listing
2006 Mar 22
10
Need for multiple acts_as_list
I have a model "Childmodel" that belongs_to two other models "Parent1"
and "Parent2". "Parent1" "has_many :childmodels, :order => :positionp1"
and "Parent2" "has_many :childmodels, :order => :positionp2". i.e. The
child is independently positioned within each of its parents.
This works fine and gets me the useful