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Collections

Tap a property of a collection

If you have a collection you can tap a relationship of an object in the collection to get a new collection of the relationship data. You can also tap a property of the object in the collection to get a new collection of all instances of that property in that collection.

$users = User::all();
$actions = $users->roles->actions;
$roleNames = $users->roles->name;

In this example, $actions would return a collection of all actions attached to all roles attached to the users. $roleNames would return a collection of every role name for each role the users are attached to.

Run method on collection

You can run a method on the entire collection such as save(), or delete(). If you wanted to delete an entire collection you could do

$users->roles->delete();

Searching a collection

If you need to return a specific set of objects from a collection you can call the getWhere() method on the collection. This is a magic method used to search the collection. Get where can take several extra parameters by changing the method name.

Method name convention

getWhere[ in between like null many ] [not] [ first last ](mixed $column, mixes $value)

Method parameters

Method Name Parameters Result
getWhere STRING $column
STRING $value		 This will return all object in the collection that have the column $column that equals $value.
getWhereIn STRING $column
STRING $values		 This will return all objects in the collection where the column $column is in the array of $values.
getWhereBetween STRING $column
STRING $values		 This will return all objects in the collection where the column $column is between $values[0] and $values[1].
getWhereLike STRING $column
STRING $value		 This will return all objects in the collection where column $column contains the sub string $value.
getWhereNull STRING $column This will return all objects in the collection where column $column is null.
getWhereMany ARRAY $columns => $values This will return all objects in the collection that match all where statements in the passed in array.

Method Modifiers

Modifier Name Effect Examples
not Reverses the effects of the methods. getWhereNotIn, getWhereNot, getWhereNotBetween
first This will return only the first object in the collection. The first operator can be added to all methods to return the first result.
last This will return only the last object in the collection. The last operator can be added to all methods to return the last result

{info} In all of the above methods you can use -> to tap through objects.
Ex: $this->collection->getWhereNotBetween('kids->age', [2, 4])s;

Example

You can also look at the tests for more examples

$aColleciton->getWhere('aField','Some Text');
$aCollection->getWhere('relationship->aField', 'Some Text');
$aCollection->getWhereNot('relationship->aField', 'Some Text');

Explode

The explode static method is used to break a string directly into a collection.

SupportCollection::explode('glue', 'string');

Parse Mixed

The parseMixed method is used to try and convert anything to a collection.

$commaString = EloquentCollection::parseMixed(',foo,bar,baz,', ',|+');
$pipeString  = EloquentCollection::parseMixed('foo|bar|baz', ',|+');
$plusString  = EloquentCollection::parseMixed('foo+bar+baz', ',|+');
$allString   = EloquentCollection::parseMixed('foo,|+bar+baz', ',|+');
$array       = EloquentCollection::parseMixed(['foo', 'bar', 'baz']);

All of the above examples will convert to a valid collection. The first parameter is the item to parse and the second is the delimiter used in the case of the item being a string.

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