Doctrine_manual-1-2-en

Chapter 13: Data Validation 211
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Examples
Not Null
A not-null constraint simply specifies that a column must not assume the null value. A not-null
constraint is always written as a column constraint.
The following definition uses a notnull constraint for column name. This means that the
specified column doesn't accept null values.
// models/User.php
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class User extends BaseUser
{
// ...
public function setTableDefinition()
{
parent::setTableDefinition();
// ...
}
}
$this->hasColumn('username', 'string', 255, array(
'notnull' => true,
'primary' => true,
)
);
Here is the same example in YAML format. You can read more about YAML in the YAML
Schema Files (page 195) chapter:
---
# schema.yml
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# ...
User:
columns:
username:
type: string(255)
notnull: true
primary: true
# ...
When this class gets exported to database the following SQL statement would get executed
(in MySQL):
CREATE TABLE user (username VARCHAR(255) NOT NULL,
PRIMARY KEY(username))
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