Given two model classes, Foo and Bar, I want Foo to have 3 references to separate instances of Bar using 3 different property names, with the foreign key on the Foo table. Bar will be managed separately and can belong to many instances of Foo. This somewhat explains it, obviously has_one is the wrong association to use (I think?): Foo ...
Hello there, Well, I don't know if I'm completely wrong, but I really can't find a very practical and straight forward way to do something like this: class User < ActiveRecord::Base has_many :creations end but the thing is, I just want the user to have many creations if the user.developer == true where user.developer is just a boole...
Hay guys, I'm a novice to intermediate RoR programmer. However, I'm not too good on setting up relational database's so i need a hand. Basically my app is a book club. A user signs up, the user creates a book club based on a book. Other users joins this club and discusses it (like a forum). I have written a english description of the s...
I have a method that I've started to use in multiple models for Webscrapping, where is the best place to keep it? Should I put it in the application_controller, application _helper? I'm not sure where a good place is to put it for multiple models to use it? def self.retryable(options = {}, &block) opts = { :tries => 1, :on => Ex...
I am looking for help in determining if the class model that I am building can be improved upon. The class that I am building is a simple Product class with a few attributes. class clsProducts { private string _name; private double _productionRate; //Constructor public clsProducts() { _name = "null...
I'm writing a document-based client application and I need a DOM or WPF-like, but non-visual model that: Is a tree composed of elements Can accept an unlimited number of custom properties that get/set any CLR type, including collections. Can inherit their values from their parent Can inherit their default values from an ancestor Ca...
How do I change validates_numericality_of :test, :greater_than_or_equal_to=>0 into validate form I tried only character and nil values. I need to check also it must be greater than 0 validate change_test def change_test if @test.nil? errors.add_to_base('Hi Test should be only number') end end and also I tried like this, ...
We are having MVC view where user can select few fields. I want to read the data from the view. Currently using model binders i am able to read only the changeable data (from text box) into the object. How do i read the data held in label in the view using model binders? ...
As a simplified example, I have the following data classes: public class Employee { public string FirstName { get; set; } public string LastName { get; set; } public Position Position { get; set; } } public class Position { public string Title { get; set; } public string Description { get; set; } public decimal ...
Is there a simple way of extracting the database model of existing DBs? I played around in the management studio and in Visio, even though I found very interesting features of data integration I failed to perform a simple export of the structure of the DB. Could anyone pls give me a hint how to perform such an export, basically I only n...
Given data of the following form myDat = structure(list(Score = c(1.84, 2.24, 3.8, 2.3, 3.8, 4.55, 1.13, 2.49, 3.74, 2.84, 3.3, 4.82, 1.74, 2.89, 3.39, 2.08, 3.99, 4.07, 1.93, 2.39, 3.63, 2.55, 3.09, 4.76), Subject = c(1L, 1L, 1L, 2L, 2L, 2L, 3L, 3L, 3L, 4L, 4L, 4L, 5L, 5L, 5L, 6L, 6L, 6L, 7L, 7L, 7L, 8L, 8L, 8L), Condition = c(0L, ...
I have an ActiveRecord model whose fields mostly come from the database. There are additional attributes, which come from a nested serialised blob of stuff. This has been done so that I can use these attributes from forms without having to jump through hoops (or so I thought in the beginning, anyway) while allowing forwards and backwar...
Alright, I have a really basic QStandardItemModel, filled with some numbers. I managed to display it in a QTableView, it's ok. I created a new model ( subclass either of QAbstractItemModel or QAbstractProxyModel ), which is some kind of a layer of an existing model - it is needed to set the sourcemodel, and this new layer should do some ...
If I want to have validation only on create, then I can do validates_presence_of :password, :on => :create but how do I say on create and update? I tried this but didn't work. validates_presence_of :password, :on => [ :create, :update ] Do I have to define the validation two times? ...
I have the following simple problem that I'd like to use to experiment with MS Solver Foundation: I have a schedule where I need to have 2 workers per day for 30 days. I need to honor the following constraints: No people should work two days in a row. Unless a special exception is applied, people should only work once per week. Some ...
I have a question regarding keeping the controller and view separate. It seems to me that the controller should only pass a model to the view, and the view decides how to display the model. This way, the controller and model stay separate and can be independently developed. However, a lot of tutorials I see online and even in the book Pr...
I followed these tutorials: http://www.asp.net/learn/mvc/tutorial-39-cs.aspx http://schotime.net/blog/index.php/2009/03/31/integrating-xval-validation-with-linq-to-sql/ in order to enforce data validation using Data Annotation for a LINQ-To-SQL-generated class. The metadata class looks like this: [MetadataType(typeof(PositionValidatio...
hi folks i have build everything in order to create a model from 2 models so that i can create a view for the single model. one table holds info for 1 quote and the second table holds a list of items within that quote. the error i get is: The model item passed into the dictionary is of type 'graniteConcepts.Controllers.QuoteViewModel'...
How would one go about retrieving a dependent/parent object from an entity. $person->getAddress(); This should retrieve the Address object for that person from the database and return it as an object. Is this a good way to do it and how should the code look like if this is ok to do. Doing this would mean that the object itself should...
I think the easiest way to ask this question is with the actual real-world situation I'm facing. In our system, we have a Site model (classic MVC framework here) that represents a row in our site table. One of the fields of the site table that is stored in the Site model is the time zone of the site. We use this to adjust UTC datetimes ...