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Is it safe to say that in a UML class diagram, if there is an association of n to 1 objects, then the association arrow is pointing from the class associated with n objects to the class associated with 1 object?
n ----> 1
Started by Phenom on
, 5 posts
by 5 people.
Answer Snippets (Read the full thread at stackoverflow):
At least in object oriented programming, the one class that has the "1" association (reference of the n objects can access that 1 object....
If its an aggregation then the default is bi.
It depends on the type of association.
Not precisely.
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I'm slightly confused about a polymorphic association I've got. I need an Article model to have a header image, and many images, but I want to have a single Image model. To make matters even more confusing, the Image model is polymorphic (to allow other...
Started by Jamie Rumbelow on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
Include :dependent => :destroy too, to ensure that the images are destroyed if the article is removed
class Article < ActiveRecord... .
You might need to specify the class name for header_image , as it can't be inferred .
That's totally possible.
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In a UML class diagram, what is the difference between an association relationship and a dependancy relationship?
From what I know, an association is a stronger relationship than a dependancy, but I'm not sure how it is stronger.
Any example would be ...
Started by Charlie on
, 4 posts
by 4 people.
Answer Snippets (Read the full thread at stackoverflow):
An association is a strong (static....
A dependency is very much implied by an association.
What is the difference between dependency and association?
An association almost always implies, instantiates, or uses another object.
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I have four model classes:
class Group < ActiveRecord::Base has_many :projects has_many :personal_blogs end class Project < ActiveRecord::Base has_many :events, :as => :event_producer end class PersonalBlog < ActiveRecord::Base has_many :events...
Answer Snippets (Read the full thread at stackoverflow):
Why not just do:
class Group <.
But will allow you to use a "has_many through" association.
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Hi folks,
I am looking for an open source UML tool that can handle association classes. So far I have looked at several out there (ArgoUML, Fujaba, etc.) and unfortunately so far none of them support association classes. Also, the tool must have the ability...
Started by Luis Miguel on
, 5 posts
by 5 people.
Answer Snippets (Read the full thread at stackoverflow):
TopCoder UML Tool
ArgoUML does support association....
And reverse ...
If you are on Windows check StarUML it supports association classes
The NetBeans UML plugin represent association classes and of course generate source code ...
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What's the difference between Association and Dependency? Aren't they both the same thing? as if class A is associated with B then Class A is dependent on B ie. there's a dependency between A and B.
Started by sevugarajan on
, 4 posts
by 4 people.
Answer Snippets (Read the full thread at stackoverflow):
When you are speaking in UML terms, an association allows one object to send.
Similar topic in SO: Does an association imply a dependency in UML?
In the above post that another object exists.
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I'm writing an extension for Spree and I want to remove an existing association.
Given the following code:
class Project < ActiveRecord::Base has_one :status ... end
How can I remove the call to has_one :status at runtime? I want to remove the association...
Started by Dave on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
Def need_assoc eval << is to keep the association from....
You only need the association in a class that is used in a method designed to be executed from a cronjob or batch? Then you might eval the code to bring in the association.
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From a cursory glance, they appear to be simply two different approaches to the same set of problems, except that named scopes are chainable, while association extensions are not.
Can anyone explain further, or provide an example that would be more appropriate...
Started by Logan Koester on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
Check out the Association Extension section of the Rails docs:
http.
Association extensions into the relationship.
The same function, its just that association extensions are faster.
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On this webpage which shows how to draw a class diagram, why is the arrow for association pointing from order to customer, and not from customer to order?
UML Tutorial - Class Diagrams
Started by Phenom on
, 7 posts
by 7 people.
Answer Snippets (Read the full thread at stackoverflow):
In this case, the navigability-us/library/dd409416%28VS.100%29.aspx
Properties....
Association ends have a boolean navigability property in UML.
It means that for an order to exist, there must exist a customer at some point .
Type of association.
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Hi,
I have a few questions related:
1) Is possible to make my program change filetype association but only when is running? Do you see anything wrong with this behavior?
2) The other option that I'm seeing is to let users decide to open with my application...
Started by MatÃas on
, 6 posts
by 6 people.
Answer Snippets (Read the full thread at stackoverflow):
As for wrong is that if your application or PC exits unexpectedly, you run the risk of not returning the association can implement an "on the fly" file association....
During application close, as file type association are just a registry setting.
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