similar to: Manipulating form inputs?

I''m trying to get substring from a utf-8 encoded string. (say, first 50 characters of the string) String#[0..49] would give me the first 50 bytes not 50 characters.. I know there is jcode library, but it only let you count number of characters in utf-8 string. unicode gem doesn''t seem to help much. unicode_hacks gem seem to solve the problem, but it also seems to

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

How can I find all the methods on an object from withing irb? Thanks, Joe

Hi! I got a class named EinsatzFilter which I serialized to session. Before saving to session it works afterwards I keep getting the message: "undefined method `to_s'' for #<Person:0x38c6ab8>". "Person" is a from ActiveRecord::Base inherited class. Code: class EinsatzFilter include ApplicationHelper attr_reader :personen, :monat, :projekte, :kunde

Hi, I am trying to validate a numeric value passed in from a form, which is saved in a MySQL db as decimal(9,2) Now problem is I need to ensure people don''t enter a form value like -. 003. In my validations, I have a validates_numericality_of check being done. Furthermore, in validate method, I have a check using an if statement such as : ((an_object[n].nil? or an_object[n] < 0) and

I have two problems. I have a comment that has_many uploads. Before saving the comment, I want to be sure that the upload(s) has passed validation, but I also need to validate in other ways. For example, I do not want to save the comment if there is no comment or upload. Or, I do not want to save the comment if the image has been uploaded previously (comparing md5s with past upload md5s

Creating looped pulldowns in PHP is simple so I can''t figure out why it seems to elude me in RoR. I want to create a simple pulldown list with the options and values "1" through "14." I have been trying to accomplish this with the .upto method like so: --START RHTML CODE-- <% options_array = [ 1.upto(14) {|i| print "[" i "," i "]"}

There''s a small inconsistency in ActiveRecord''s callback syntax that has tripped me up before. It wouldn''t be a big deal, but it can lead to a silent failure. I''d like to suggest that it either be made consistent or be made to fail loudly. The issue is that to do something before validating, but only when creating, you use `before_validation on: :create`,

In ActiveRecord''s callbacks, methods within a before_create callback are called after the validation, but before the model is created. This was an intentional design decision, but I think it was the wrong one. What do you think? When I think of before_create, I think of before_validation :foo, :on => :create, but, by default, before_create is synonymous with after_validation :foo,

Hi all, For various reasons I need to have foreign keys with not null constraints. Eg: create_table :people do |t| t.column :name, :string t.column :household_id, :integer, :null => false end create_table :households do |t| t.column :name, :string end add_foreign_key_constraint :people, :household_id, :households, :id So the people table has a foreign key into

Hi all, I''ve got a form which accepts a "price" field and I''m attempting to validate it and allow some flexibility in the way the user enters it. It''s a numeric field but I want the user to be able to enter dollar signs and commas naturally in the data entry. I''m trying to understand how to use validates_format_of, and I''m not sure what

Hi all My visitors can create party organisator profiles, and I want assign them as the creators (the field creator_id in the organisators table references a member in the members table). To do that I tried it with before_validation: def before_validation creator = Member.find 1 end Sadly, this does not work. The validation validates_presence_of :creator_id Still tells me, that

Hi, I was looking around a bit and couldn''t find any callbacks that executed before before_validation The current problem with using before_validation is that it won''t fire if I''m not using validations with #save(:validate => false) - which makes sense. Before_save won''t suffice because I want these callbacks to fire before validation on the occasions that

I tend to allow nulls in cases where the value is unknown, even if it''s a text/varchar field. RoR seems to push empty strings into these fields. Is there any way to get RoR to use NULL vice '''' if the input box is empty? Thanks! - Ian

Hi, I often find myself using bits of code like this inside ActiveRecord, perhaps it''s useful for others, or others can improve on it: ########### # fix user input before validating it before_validation :sanitize_input # santize input before actual validation is called # this uses the little methods defined below def sanitize_input trim %w(adres postcode woonplaats email naam

I want to remove the leading and training spaces for most of the resources in my rails application For a new POST request, rails does the xml parsing and passes the params hash to the controller. Some of the parameters have leading and/or trailing whitespaces which are causing problems (e.g. new resources being created rather than using the old ones). I don''t want to put the code in all

Hi All, Is there a way to filter / modify the output of a model class before it''s returned to controller/view that''s calling it? Example: I have a field phone_number which I always want to preformat using the number_to_phone() helper.... Any help is appriciated. Thanks! -- Posted via http://www.ruby-forum.com/.

Watching the test results scroll by, it occurred to me that there must be an easier way than either letting it go or capturing it to a log file to mess with in TextMate. Here''s my first stab at an HTMLifier for test output. Just download, unzip, chmod +x, and you can: rake | ./prake.rb Which, if you are on a Mac, should bring up a Safari window with a summary of the problems at the

before_save :strip_strings validates_uniqueness_of :username validates_presence_of :username private def strip_strings self.username = username.gsub!(" ","") end example: username = " gissmoh-/upiLifMog2ELgA04lAiVw@public.gmane.org " becomes gissmoh-/upiLifMog2ELgA04lAiVw@public.gmane.org and is stored in the

who can explain this to me? def before_validation logger.info url url = "http://" << url if url[0..3]=="www." end the logger line correctly logs any URL that''s been submitted, let''s say it''s "www.amazon.co.uk" BUT Rails raises an exception on the next line, complaining about nil. [] (obviously from the url[0..3] bit) It works