Senior & Expert RoR Developers Discussion Forum by Nyros Technologies

Hi all,

acts_as_list is one of the predefined function available in active Record. It will Gives child data lists-like behavior.

Parent will be able to traverse child data, move it around and ...

Using Date.parse method you can convert string into date format.

syntax :

require 'date'

Date.parse ("21-july-2010")

Hi,

The methods are which are in singleton class is called singleton methods. The singleton class is also called as object-specific classes, anonymous classes, and virtual classes. Mostly it is c ...

Hi,

By using the following code we can generate Cartesian product of 2 arrays.

def cartesian(*args)
final_output= [[]]
...

Hi ,

While using associations will reduce lot of code and we can prevent the writing database related queries in views. But while using associations we will have a problem called 1+N. The associ ...

You can write like this

before_save :update_information, :if => :enabled, :unless => "<some condition>"

Thanks

Hello,

Rails provided another option called "having" on find method. we can also write this in "has_many" and has_and_belongs_to_many associations for filtering data in groupe ...

Hi,

Proc and Lambda are 2 code blocks in ruby which are used to write number of statements.

A Proc is a code block that has been bound to a set of local variables. Once bound, the code block ...

Hi,

By using named_scope we can get the data very easily and it will reduce the lot of code. named_scope adds a class method for retrieving and querying objects. A scope represents a narrowing of ...

Hi,

The resources method accepts the following options to customize the resulting routes:

1) :collection - Add named routes for other actions that operate on the collection. Takes ...

Hi All,

While we are writing the code will use inheritance to express the relationships between abstractions. In some cases we need a situation like

For example Users can have various rol ...

Here is the datatypes for remaining database

Type DB2 mysql openbase oracle
------------------------------------------------------------------------- ...

Hi,

While embedding a value to the datbase column name it will throws an error. i tried to append it by using #{} and +. nothing will hep. But when i used eval the problem is solved. i am succ ...

Hi to all,

Based on my previous experience i collected some of the datatypes declaration in some databases. Because while executing rake db:migrate many times i have faced few problems due to d ...

Hi all,

To Hide the some action in controller we will use this tag.

In some cases we will write a method in a controller but if we don’t want it to be accessible as an action to the public, we w ...

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