Class QdbTag

A tag in the database.

A tag is a lightweight means of finding entries in the database.

QdbEntry

QdbTag

Example:

You get a QdbTag instance by calling QdbCluster::tag(). Then enumerate entry having this tag:

$users = $cluster->tag('user')->getEntries();
foreach ($user as $user) {
    echo($user->alias());
}

Methods summary
`public boolean`	# `attachEntry( QdbEntry\|string $entry )` Attaches the tag to an entry. Attaches the tag to an entry. Parameters `$entry` The entry to add the tag to, or its alias. Returns boolean `true` if the tag was added, or `false` it the entry already had this tag. Throws `QdbIncompatibleTypeException` Example $cluster->tag('male')->attachEntry('Bob the Blob'); // same as $cluster->blob('Bob the Blob')->attachTag('male');
`public QdbEntryCollection`	# `getEntries( )` Enumerates tagged entries. Enumerates tagged entries. Returns `QdbEntryCollection` A traversable collection of `QdbEntry`. Throws `QdbIncompatibleTypeException` Example $males = $cluster->tag('male')->getEntries(); foreach ($males as $entry) { echo($entry->alias() . ' is a male'); }
`public boolean`	# `hasEntry( QdbEntry\|string $entry )` Checks if an entry is attached with the tag. Checks if an entry is attached with the tag. Parameters `$entry` The entry to check, or its alias. Returns boolean `true` if the entry is tagged with the given tag, `false` otherwise. Example $bob_is_male = $cluster->tag('male')->hasEntry('Bob the Blob'); // same as $bob_is_male = $cluster->blob('Bob the Blob')->hasTag('male');
`public boolean`	# `detachEntry( QdbEntry\|string $entry )` Detachs the tag from an entry. Detachs the tag from an entry. Parameters `$entry` The entry to remove the tag from, or its alias. Returns boolean `true` if the tag was removed, or `false` it the entry already didn't have this tag. Throws `QdbIncompatibleTypeException` Example $cluster->tag('stupid name')->detachEntry('Bob the Blob'); // same as $cluster->blob('Bob the Blob')->detachTag('stupid name');

Methods inherited from QdbEntry
`alias(), attachTag(), detachTag(), getTags(), hasTag(), remove()`

Classes

Exceptions

Class QdbTag

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