similar to: trouble using ActiveRecord classes

Hello, despite many readings I still don''t understand how to solve my problem. I have Publication, Picture, File classes A Publication can be related (a one way relation, like a www link) with another Publication, Picture or File I tried this : Publication : has_many :related_elements, :dependent => :destroy, :foreign_key => :publication_id has_many :related, :through =>

Hi, I am trying the following in Ruby using InstantRails 1.7 on WindowsXP Publication.find(:all, :include => [:doc_type, :release_state] ) but I get the error: OCIError: ORA-00904: "DOC_TYPES"."PUBLICATION_ID": invalid identifier: SELECT publications.id AS t0_r0, publications.docid AS t0_r1, publications.doc_type_id AS t0_r2, publications.title AS t0_r3,

I''m trying to query one table to ultimately display the relate info from another table. I have 2 tables: "posts" and "numbers". I''m trying to do a query like this: @numbers = Number.find(:all, :conditions => [ ''(user_id) = :id'', {:id =>

I have the acts_as_ferret plugin installed. Everything searches great, but I would like to limit the results (i.e. by ''end_date'') and sort them (by ''end_date''). ''end_date'' is a valid column in my "posts" table. Here''s the code I have already: @posts = Post.find_by_contents(params[:query]) params[:query] comes from a form. I

I''m trying to create a paginated list that will take note of the "end_date" field in my table. This is what I have: @post_pages, @posts = paginate(:posts, :per_page => 10, :order_by => ''end_date'') in the controller. And for the view: <h1>Posts ending soon</h1> <ul><% for post in @posts do %> <strong>Post Title:

Hello, - the form posted by the user have a date field - this date is begin_date, I need to compute end_date - so, added callback before_validation_on_create - in this method I do : end_date = begin_date >> 12 - unfortunately, beeing in before_validation the actual self.begin_date have not been type casted - It''s always a string - unfortunately again, I can''t put this code

Hi fellas, I am working on a dataframe cam and it involves comparison within the 2 columns - t1 and t2 on about 20K rows and 14 columns. ### cap = cam; # this doesn't take long. ~1 secs. for( i in 1:length(cam$end_date)) { x1=strptime(cam$end_date[i], "%d/%m/%Y"); x2=strptime(cam$end_date[i+1], "%d/%m/%Y"); t1= cam$vol[i]; t2= cam$vol[i+1];

Got a weird situation with an update put to a controller with a form with nested attributes. On the data below, I am updating data for both items (''0'' and ''1'') in rosters_attributes (in the example below I am updating the ''name'' attribute to a new value in both cases. What I am stuck on is that ''1'' gets its data updated,

Folks, i thought it should be straightforward but after a few hours poking around, I decided it's best to post my question on this list. I have a data frame consisting of a (large) number of date columns, which are read in from a csv file as character string. I want to convert them to Date type. Following is an example, where the first column is of integer type, while the rest are type

Hi! I have a table with visits with a visited_at: attribute which is a datetime field. They seem to be stored as UTC. Now I want to count all visits each day and return something like: { 2013-01-01: 8, 2013-01-02: 4, 2013-01-07: 9, ... } So, I did it like this which kind of works...: def self.total_grouped_by_day(start_date, end_date) visits = where(visited_at:

I have what amounts to a simple search engine running through a table using input from a form. Everything works fine when looking for "title" or "body" But, when I want to couple that with an AND statement the search still works fine, but it seems to disregard the AND statements. Code below: In the view: <%= start_form_tag :action=> "show_search" %>

Dear all; I am searching for a way to extract wind direction and speed from a wind rose plot. I have a graph and I want to make a dataframe of 5 years with hourly intervals. > start_date <- as.POSIXct("2019-01-01 00:00:00") > end_date <- as.POSIXct("2023-12-31 23:00:00") > time_sequence <- seq(from = start_date, to = end_date, by = "hour") > df

I have the acts_as_ferret plugin installed. Everything searches great, but I would like to limit the results (i.e. by ''end_date'') and sort them (by ''end_date''). ''end_date'' is a valid column in my "posts" table. Here''s the code I have already: @posts = Post.find_by_contents(params[:query]) params[:query] comes from a

Hi, I have the following problem. In a csv file I have under column A, the date, and column B, the prices. Thus, for example, the file looks something like this -> 1/31/04 2.5 2/1/04 2.6 ... 4/12/04 3.5 Basically, I use the function inputframe = read.csv( ) which reads the csv file into the inputframe. My question is, how can I make a function that has, as inputs,

I have 3 models, class Host ref: string address: string, name: string primary_key=''ref'' has_many :rooms, :class_name=>"Room", :foreign_key=>''host_ref'' Class Room ref :string host_ref: string capacity: integer primary_key=''ref'' has_many

I have the code for computing a weekly event: (start_date..end_date).select{|d| d.wday == wday} but I am wondering if anyone has any ideas for using this to figure out a recurring event for every other week. Is it possible to somehow specify every other within the .select method? Any other implementation ideas? --~--~---------~--~----~------------~-------~--~----~ You received this message

Hi List, I have one column of beginning dates and one column of ending dates, I want to find their difference. And I want to ignore the trailing zeros, basically everything after the first colon mark. Begin_date End_date 01JAN2000:00:00:00:000 02FEB2002:00:00:00:000 24MAR2012:00:00:00:000 18MAY2012:00:00:00:000 01OCT2003:00:00:00:000

A wind rose plot omits time information. Your request is simply not possible. On October 30, 2024 3:48:03 AM PDT, javad bayat <j.bayat194 at gmail.com> wrote: >Dear all; >I am searching for a way to extract wind direction and speed from a wind >rose plot. I have a graph and I want to make a dataframe of 5 years with >hourly intervals. > >> start_date <-

Hello It seems that datetime_select, is creating an instance of the Time class. Why would that be? I found this while building a site where people can create vigils (prayer vigils, peace vigils, etc). When I added a validation method that compared start_date to created_at, it generated the error: ArgumentError (comparison of Time with DateTime failed): I was able to put a breakpoint in the

I am getting "DESC CYCLEMSTR" failed; does it exist? errors on a table named CYCLEMSTR in Oracle every 3 out of 4 trys to do a simple find(:all) on the table. It is a legacy table that only contains 12 rows of join information. I don''t understand why it works one out of every 4 or 5 times help please. trace: (eval):3:in `describe''