I'll start off by saying I am new to Ruby and Rails...
Suppose I run the following;
$ script/generate model person
which creates:
class CreatePeople < ActiveRecord::Migration
def self.up
create_table :people do |t|
t.timestamps
end
end
def self.down
drop_table :people
end
end
I added in some code (the author instructs me to) such that it now
reads:
class CreatePeople < ActiveRecord::Migration
def self.up
create_table :people do |t|
t.string :name, :type, :email, :camera #ADDED IN
t.timestamps
end
end
def self.down
drop_table :people
end
end
I do not understand, at a ruby level, what is going on. It appears I
have a class (static) method called up. The first thing I am doing is
calling Migration's create_table method. This leads to question 1:
1:) Migration does not have create_table method. How is Ruby finding
create_table?
Now the create_table method appears to accept two parameters. The first
being a symbol, and the second being a code block.
I am assuming that the only thing obtainable from this code block is the
last line t.timestamps, as the last line is returned in ruby.
So question number two:
2: What does this line even do?
t.string :name, :type, :email, :camera #ADDED IN
What is t being passed in? why no comma between t.string and :name.
And my final question...
How come I cannot write the code as follows (Aptana will not compile
it)?
def self.up
create_table (:people,{|t|
t.string :name, :type, :email, :camera
t.timestamps
})
end
BTW as I hunt I do see this in Migration:
def method_missing(method, *arguments, &block)
It is taunting me.
Feel free to respond to me like I am four. You could try to insult me
but you would fail :-)
Thanks,
Cris
--
Posted via http://www.ruby-forum.com/.
--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups "Ruby
on Rails: Talk" group.
To post to this group, send email to rubyonrails-talk@googlegroups.com
To unsubscribe from this group, send email to
rubyonrails-talk+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en
-~----------~----~----~----~------~----~------~--~---
