Ruby on Rails, mysql column type :text, What class is this as a ruby object?



你好,


When a column in mysql table is typed :text, how is this then treated in Ruby.


In other words, what is the class?


Is it a string?


Related to : Ruby on Rails, mysql column type :text, What class is this as a ruby object?
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I am implementing a single table inheritance inside Rails. Here is the corresponding migration:


class CreateA < ActiveRecord::Migration
def self.up
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t.string :type
end
end

Class B inherits from A:


class B < A
end

Now, it's easy to get all instances of class B:


B.find(:all)

or


A.find_all_by_type("B")

But how do I find all instances of class A (those that are not of type B)? Is this bad organization?

<
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thanks,


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Ruby on Rails, mysql column type :text, What class is this as a ruby object?
Databases

你好,


When a column in mysql table is typed :text, how is this then treated in Ruby.


In other words, what is the class?


Is it a string?


ruby-on-rails: text data type migration with postgres database
Databases

I'm developing rails application on Postgres.
One problem that I've been experiencing is when I try to assign an empty text(') to a text column value. it only recognizes that the text I want to assign is two single quotes as text value literally.


My table schema:


create_table :products do |t|
t.integer :seq
t.string :title
t.text :description
t.timestamps
end

My problematic migration:


Product.create({:seq => 1, :title => 'green_cos', :description => '})

Here is the resulting record:<


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