similar to: Delaying initialization of associations until first access

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/.

Hi, I''m looking for a way to extend one of my models to allow some level of abstraction between what goes into it and how it is stored. For example, say I have a Product and I want to set it''s price. A person using the website will type the price in euros. Internally, I''d like to store the price as an integer value of cents. I can currently do this with some ugly code

Could someone explain this? #config/initializers/ar_attributes.rb module ActiveRecord module AttributeMethods alias_method :ar_read_attribute, :read_attribute def read_attribute(attr_name) p "read_override" ar_read_attribute(attr_name) end alias_method :ar_write_attribute, :write_attribute def write_attribute(attr_name, value)

All, I''m finally doing my first real form in Rails - the model object that I''m entering information for has 8 validations so far. If I type in good values for all the fields but one, I get the pretty validation, and the nice field highlighting, but all of the fields are cleared, forcing me to retype all of that info. That is a big drag. Is there a standard way to get the

Would really appreciate it if someone could tell me why this is happening: I override ssn method of AR class so I can encrypt/decrypt to/from the db: class Person < ActiveRecord::Base def ssn=(value) write_attribute(:borrower_ssn, Crypto.encrypt(self.encryption_key, value)) write_attribute(:borrower_ssn_final_four, value[5,4]) end def ssn # this begin - rescue can be

Hi all! I have come into a strange issue in Rails that I am hoping someone can shed some light. To make a very long story short, I have been researching how to override ActiveRecord::Base#read_attribute and write_attribute to perform security checks at the model level (influenced by the ModelSecurity generator). Shortly after implementing some code to check this behavior, I began to

This seems like it must have been asked before - I really _did_ try to find it in the archives, so my apologies if it''s already out there. Utilizing ActiveRecord, I would like to specify a prefix for the column names in my table. For example, in ''Recipe 16 Integrating with Legacy Databases'' (Rails Recipes, from PragProg, by Fowler) they deal with integration with a

somple question here but pretty confusing on my side. i have a model towns that is mapped to my towns table. can i add an extra variable to the class and access it in my view? basicall what i am trying to do is return a list of towns, and next to each town, display a total number of what i have in each town. ive tried both attr_reader and @total but no avail. here is my view <% for

Le''s say that I have a table called people and the column middle_name is nullable. If the user enters say blank or empty space then in the database it is recorded as empty space. I would like in all my models all empty spaces to be recorded as null. I guess I can write a plugin which will do so for all the models but I''m sure something like that should already be existing.I

Hello all, I''ve been trying to use a facade column but I notice that the form helpers don''t seem to respect the facade. In the following example I''m trying to story the prices as Integer values but present them to the user as decimals. class Product < ActiveRecord::Base def price=(new_price) write_attribute(:price, Float(new_price)*100) end def price

Hi all - To avoid floating point issues, I''ve decided to store monetary values in cents in the database. However, the user will enter these in dollars and cents. Two questions: 1) How do I do the validation for the currency format? It looks like ActiveRecord truncates the cents since it thinks the field type is a Fixnum. Am I forced to do validation in the controller? 2) Where

Hi, I am having trouble using before_create when I have an specialized setter method: before_save :set_campaign_start #----------------------------------------------------------------------- ------- def set_campaign_start self.campaign_start = Time.now end # We want the date to always start at midnight

Hello, I needed to add custom cache field for one of my application. I thought I will share the code showing how to do this. This code below creates and maintain a custom cache field, for keeping track of totals. Say, you have accounts, and for each account there are transactions (either deposit/withdrawal), and one will like to keep track of the total balance for an account. So, let there be a

Hi all, Is there a way to invoke validations at times other than save, create and update? I know that I can do this by writing my own validation checks using errors.add_[blah], but I''d like to leverage the existing validation code. What I have is two sets of fields in a record, set A and set B. Both sets must be validated on record create. However, the trouble is that after

One of my models has a column that is updated very frequently from a separate process, so it is important that when a record is saved in rails, this column should be left alone. In the update method of the controller I have: @record = MyModel.find(params[:id]) @record.update_attributes(params[:my_model]) params[:my_model] doesn''t have a reference to the column I''m talking

Hi, I have a model similar Basket shown below. If customer_type is set then it should also set customer to nil. Likewise, if I set customer, it should inspect the customer_type attached to the customer and set accordingly within Basket. However implementing it as below doesn''t seem to work. Am I missing a better way to achieve this? I had also considered using a before_save

Hi everybody I would like a function as the "before_save" method in the model. But it must be the opposite. When I take out data from the database through the model, I want to call a function before the data are available in the controller. Can anyone help me? ---- >>>> thx <<<< ---- -- Posted via http://www.ruby-forum.com/.

i have a problem with the datetime format of rails. i am unable to save a dataset to the db. here''s the error message -- the original error message was in german, so i translated it -- i get: DBI::DatabaseError: Execute OLE error code:80040E07 in Microsoft OLE DB Provider for SQL Server Couldn''t convert a char-Datatype to datetime HRESULT error code:0x80020009

I have a model where I want to change the display for a single attribute such that if the value is an integer, it displays with no decimal point (e.g. "1"), but if it is non-integer, it displays with a decimal point (e.g. "1.25"). The easiest way to do this seems to be if I could override the to_string method for my_model.my_attribute.to_s. Is there a way to do this? Or

I want to expire caches if a certain field of an item changes. How can I compare the item field''s old value to its new value (in the create, or after_save, etc. method)? thanks csn __________________________________ Yahoo! Mail - PC Magazine Editors'' Choice 2005 http://mail.yahoo.com