similar to: select item based on previous select list selection?

Can''t seem to find an example of this anywhere - how do I populate a select list in a form from a database? I have a form to create a new task. The task is for a client, so there should be a select list populated from my clients table. I thought this would work: <%= select ''task'', ''client_id'', Client.find_all, "id", "name"

I''m trying to assign a parent foreign key value using collection_select from my child "new" form. The problem I''m having is if I do not make a selection, I get the following error instead of the Rails validates_presence_of error: You have a nil object when you didn''t expect it! You might have expected an instance of Array. The error occurred while evaluating

Hello. I want to select an item from a select list and have that result in an ajax call that updates two sections on the page. Here is the code in the controller def create ... render :update do |page| page.replace_html ''list_items'', :partial => ''lists/list_items'' page.replace_html ''add_item'', :partial =>

Hello, I''m trying to get a select field to update a view via the ''onchange'' option. I''ve seen examples of it here in the forum where people hardcode the forms and use javascript to trigger the change (and nearly all have complained that it''s a hack) and I''m wondering if anyone has a more elegant solution using the embedded ruby methods?

I have a log table which has a column recording the number of hours worked on a task. So there''ll be multiple lines for a particular task. I want to retrieve the total number of hours worked on a task, so that I can include the information when one views the task details. I can write a sql query to do this easily enough, like "SELECT SUM(hours) AS total FROM tasklog WHERE

I am having an annoying problem displaying the labels of a select box correctly where there is an ampersand contained within the label string. On a form being rendered with the form_for helper the collection_select reads data from a Mysql 5.075 database the text stored in the database is "Surabaya & Surrounding Areas" when rendered and displayed in firefox 3.6 or safari is is

So I''ve worked through Agile Web Development with Rails and I''m now trying my first little app to get into the swing of things. Its a task tracking app where people can create tasks and assign them to others, and also log time against the tasks. I''m having trouble working out the model relationships. This is what I''ve got so far, but its not right as

Is there any way to trigger a controller action when the user picks an option from a selection list? -- Posted via http://www.ruby-forum.com/.

R-newbie question I have 2 matrices (a) P1 has only one column of 32K rows (b) PC has 2 column {P, C} of 3200 rows Every values in P1 matches with a value in PC[,p] (column p). I would like to use Which to search for all value in P1 that matchex PC[,p] and get the PC[,c]. However because P1 and PC does not have the same number of rows, I got lots of 'NA'. Thanks for your

hey, i have this problem how come i always get -1 for the select list?? rhtml First, select a client. <select id="client_id" name="client[id]" onChange="submit();" > <%= options_for_select(@client_options, @client_id.to_i) %> </select><%= @client_id %> controller if @request.post? if @request.xml_http_request? #called by ajax,

can''t seem to find the right syntax for this... /script/../config/../app/controllers/placements_controller.rb:155: syntax error :conditions => [["placements.client_id = ?", params[:client_id] ] and "placements.discharge_date IS NOT NULL" ], this part works... :conditions => ["placements.client_id = ?", params[:client_id] ] this is what I

Finally found a nice date chooser script (http://projects.exactlyoneturtle.com/date_picker), but am a little confused how to implement it. So I put this where I need the date picker: <a id="_name_link" href="#" onclick="DatePicker.toggleDatePicker(''name'')" class="demo_link">[ choose date ]</a> <div

Hello, I would like to run a series of chisq.test() and store results (x-square, df, p-value) in a matrix for further analysis, but don't know how to do such. Currently I run the command line for each set of data at a time and it is time consuming. Thank you for your help. --My Coyne [[alternative HTML version deleted]]

I''ve tried moving the code around in different ways, but so far I haven''t gotten remote_function to work for me (I''m using Rails 2.3.2 on my Mac). I want to make an AJAX call when I double-click a word on my page, and the Javascript function is being called when the ondblclick event is fired, but nothing happens when it gets to my the "new Ajax.Request" part

Please can someone show me the correct syntax for a hidden field in forms, this is my code <%= start_form_tag :action => ''create'' %> <div class="form1"> <table width="auto" boader="8" cellspacing="5" cellpadding="5"> <% hidden_field ''line_item'', ''client_id'', :value

I would like to add javascript ''onChange'' event handling for a select field, such as <%= collection_select("job", "client_id" , @clients, "id", "name") %> with onChange="xxx" Anyone know how to make this work? Thank you, Scott -- Posted via http://www.ruby-forum.com/.

Thanks for the advice. Going to look into this more this evening and hopefully get everything working. Thanks again! On Thu, Nov 5, 2015 at 11:56 AM, Dirk Eddelbuettel <edd at debian.org> wrote: > > On 5 November 2015 at 11:44, Michael Coyne wrote: > | What do you have installed as far as libcurl goes? Would you mind > | listing your packages and greping for libcurl entries.

I just switched from using the standard "id" column into using my own primary key and generating my own unique id for each record. But, this breaks acts_as_tree. Because my new primary key is not an integer, it breaks the SQL query as follows: StatementInvalid in PagesController#create --------------------------------------------------------------------------------------

Hi, I am a rails and ruby nuby :-) How do you pass data between different controllers and views? I have a page ( a quote) that I am editing url ....quote/edit/6 6 id the current id. I then go to a catalog (url....catalog) to add an item to my quote (I do this via a line_item file that the quote reads) I now want to go back to the quote. I have tried this <%= link_to ''Back to

This code: <p> <label for="resource_type">Type</label><br/> <%= select(:resource, :type, %w{ Web Data }, { :include_blank => true }) %> </p> Produces this error: TypeError in Resources#new Showing app/views/resources/_form.rhtml where line #6 raised: wrong argument type String (expected Module) Extracted source (around line