similar to: catching frozen hashes

Hi, I recently added 2 serialized columns in my class Server : class Server < ActiveRecord::Base serialize :visa, Hash serialize :appli, Array ... No problem in my controller and my application and everything works as expected : Excel exports following the "visa" Hash or "appli" Array are ok. But since I added the visa Hash, I can''t load the record with

Hi all, Windows XP Oracle 10g client OCI8 0.1.16 Ruby 1.8.5 Rails 1.1.6 I''m hitting weird behavior with the Oracle adapter and a find_by_sql call on a multi-table join. The SQL looks like this: SELECT DISTINCT e1.ip_address, loc.street, loc.city, loc.state FROM schema.net_element ne, schema.equipment e1, schema.equipment e2, schema.building b, schema.cust_loc cl, schema.location

All, I''m having a hell of a time figuring out what is going on here. I''m trying to override one of my getters so that I can format it a certain way in my form. But I can''t seem to get text_field to call the appropriate method on my object. So here''s my getter: public def FAX fax = read_attribute(:FAX) puts fax

In production mode, I keep getting this error the 2nd time it loads a page with a serialized attribute: ActiveRecord::SerializationTypeMismatch (answers_container was supposed to be a Array, but was a NilClass): /vendor/rails/activerecord/lib/active_record/base.rb:1964:in `unserialize_attribute'' In development, it works fine. In fact, if I set to false config.cache_classes in

I''m currently new to Rails and Ruby and I''m trying to learn from my mistakes, this time I''m trying to upload 2 files from a form for later processing, however, after I hit the "Submit" button. I keep getting this error: TypeError in UploadFilesController#create app/controllers/upload_files_controller.rb:28:in `new''

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

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)

When a column in a database table is actual data, rather than an fkey to another table, I can override the automatic accessor by just doing the following: def field_name # do something here read_attribute(field_name) end This does not seem to work for me if the field is an fkey, say user_id, linking to another table. I''ve made this work by aliasing the accessor like this: alias

I''m learning rails and have a test application which parses parts an XML file to create AR objects and puts them in a database. The IDs in the database are taken from the XML, i.e. I explicitly set them using #id. The XML structure is mapped to AR relationships using has_many, belongs_to etc. I''m using a SAX parser, creating objects when the element start tag occurs and saving

Hi all, here is the challenge: I have this validation method, that basically prevents an object which billed = true to be updated: def before_update if read_attribute(:billed) errors.add_to_base(''This service has already been billed for'') end !read_attribute(:billed) end The above code does not work in case I do something like: object =

Hello List, I''m a bit spent on this problem, and my code might be whack. I seem to be encountering a problem where the primary key on a join table is not being resolved correctly. I will elaborate after some code bits. I am creating the join table using migrations, and relevant model code is this: class Post < ActiveRecord::Base has_and_belongs_to_many :records

Guys, Say I have the following: ----- class Person < ActiveRecord::Base has_one :house end class House < ActiveRecord::Base belongs_to :person attr_accessor :color end ----- Then I have the following code: ----- john = Person.new john.house.color = "Blue" john.save ----- What I would like to have happen, is that on first call to john.house, if house hadn''t been

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 error has been driving me nuts. It happens with no regularity or pattern and causes a 500 App error. Refreshing will always display as normal (http 200) The back trace always starts with TypeError (can''t convert Bignum into Hash): /usr/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/connection_adapters/mysql_adapter.rb:342:in `update''

Hi Everyone - I''ve got an odd sort of error when I try to use validates_presence_of for a MySQL ''datetime'' field. Here''s the relevant portion of the table definition: mysql> describe student_surveys; +---------------------+---------------------+------+----- +---------------------+----------------+ | Field | Type | Null |

Hi to everyone, My name''s Carmine and I''m a rails newbie. So, here''s my newbie question :) I have a model with one attribute named "kind" of type integer. This attribute can assume values within the range [0..5]. Each value has a "verbose" representation e.g.: 0 => grain, 1 => liquid ... To visualize the verbose representation I''ve

Hello I''ve been struggling with something for hours that I thought would be a simple job. Hopefully somebody can shed some light on what I''m trying to do :o) First of all I''ll explain what I''m trying to achieve. In a store application I want to have products and product variations. A product variation should inherit all of its properties from product unless

I''m new to Rails and so was wondering if the following strategy is a good idea. Background: I''m writing a eCommerce application which has a Product model and an Option model, they are setup with a has_and_belongs_to_many relationship. The Product model features the ''base'' attributes of the product and then the shopkeeper *can* add one or more Options that

Hi, I''m building a frontend for a legacy schema, with tables like this: CREATE TABLE `types` ( `a_type_cd` varchar(6) NOT NULL default '''', `a_type` varchar(30) NOT NULL default '''', PRIMARY KEY (`a_type_cd`) ); The primary key is specified by the user (not auto-generated), and needs to be updateable. I create the following a base class to

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