Differentiating New Objects Versus Retrieved Objects
$begingroup$
I wrote this class in php:
class Category {
private $index;
private $name;
public function __construct(
int $index = null,
string $name
){
$this->index = $index;
$this->name = $name;
}
public function getIndex(): int {
if( $this->isNew() )
throw new Exception('The index of a category cannot be retreived when the category is newly added and no index has been assigned.');
return $this->index;
}
public function getName(): string {
return $this->name;
}
public function isNew(): bool {
return is_null( $this->index );
}
}
New Category is created like:
$category = new Category( null, 'new');
If an old category is retrieved my CategoryMapper, would create it like:
$category = new Category( 10, 'old');
I need to find out if a Category is new, so I can process it correctly to the database ( UPDATE vs INSERT).
I am not really sure if I should be using the index as a flag.
Maybe, I could inherit NewCategory and RetreivedCategory from a Category class. But, that would mean one class cannot implement the getIndex() method and the other can.
How do I handle this scenario?
Thanks for any feedback ;).
php object-oriented design-patterns
edited 9 mins ago
Emma
1196
asked 2 hours ago
RMoRMo
1386
$endgroup$
add a comment |
$begingroup$
I wrote this class in php:
class Category {
private $index;
private $name;
public function __construct(
int $index = null,
string $name
){
$this->index = $index;
$this->name = $name;
}
public function getIndex(): int {
if( $this->isNew() )
throw new Exception('The index of a category cannot be retreived when the category is newly added and no index has been assigned.');
return $this->index;
}
public function getName(): string {
return $this->name;
}
public function isNew(): bool {
return is_null( $this->index );
}
}
New Category is created like:
$category = new Category( null, 'new');
If an old category is retrieved my CategoryMapper, would create it like:
$category = new Category( 10, 'old');
I need to find out if a Category is new, so I can process it correctly to the database ( UPDATE vs INSERT).
I am not really sure if I should be using the index as a flag.
Maybe, I could inherit NewCategory and RetreivedCategory from a Category class. But, that would mean one class cannot implement the getIndex() method and the other can.
How do I handle this scenario?
Thanks for any feedback ;).
php object-oriented design-patterns
edited 9 mins ago
Emma
1196
asked 2 hours ago
RMoRMo
1386
$endgroup$
add a comment |
$begingroup$
I wrote this class in php:
class Category {
private $index;
private $name;
public function __construct(
int $index = null,
string $name
){
$this->index = $index;
$this->name = $name;
}
public function getIndex(): int {
if( $this->isNew() )
throw new Exception('The index of a category cannot be retreived when the category is newly added and no index has been assigned.');
return $this->index;
}
public function getName(): string {
return $this->name;
}
public function isNew(): bool {
return is_null( $this->index );
}
}
New Category is created like:
$category = new Category( null, 'new');
If an old category is retrieved my CategoryMapper, would create it like:
$category = new Category( 10, 'old');
I need to find out if a Category is new, so I can process it correctly to the database ( UPDATE vs INSERT).
I am not really sure if I should be using the index as a flag.
Maybe, I could inherit NewCategory and RetreivedCategory from a Category class. But, that would mean one class cannot implement the getIndex() method and the other can.
How do I handle this scenario?
Thanks for any feedback ;).
php object-oriented design-patterns
edited 9 mins ago
Emma
1196
asked 2 hours ago
RMoRMo
1386
$endgroup$
I wrote this class in php:
class Category {
private $index;
private $name;
public function __construct(
int $index = null,
string $name
){
$this->index = $index;
$this->name = $name;
}
public function getIndex(): int {
if( $this->isNew() )
throw new Exception('The index of a category cannot be retreived when the category is newly added and no index has been assigned.');
return $this->index;
}
public function getName(): string {
return $this->name;
}
public function isNew(): bool {
return is_null( $this->index );
}
}
New Category is created like:
$category = new Category( null, 'new');
If an old category is retrieved my CategoryMapper, would create it like:
$category = new Category( 10, 'old');
I need to find out if a Category is new, so I can process it correctly to the database ( UPDATE vs INSERT).
I am not really sure if I should be using the index as a flag.
Maybe, I could inherit NewCategory and RetreivedCategory from a Category class. But, that would mean one class cannot implement the getIndex() method and the other can.
How do I handle this scenario?
Thanks for any feedback ;).
php object-oriented design-patterns
php object-oriented design-patterns
edited 9 mins ago
Emma
1196
asked 2 hours ago
RMoRMo
1386
edited 9 mins ago
Emma
1196
asked 2 hours ago
RMoRMo
1386
edited 9 mins ago
Emma
1196
edited 9 mins ago
Emma
1196
edited 9 mins ago
Emma
1196
1196
asked 2 hours ago
RMoRMo
1386
asked 2 hours ago
RMoRMo
1386
asked 2 hours ago
RMoRMo
1386
1386
add a comment |
add a comment |
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oldest
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