How does the query builder handle ->first()?
Does it simply do a Limit 1 or does it do some advanced checking to make sure if only 1 row is returned?
In rare cases, the application may want to ensure that ONLY 1 row will be returned. Perhaps ->first() is not the best solution?
Any insight or direction is greatly appreciated!
分享 The first() method will always return one result or null if no results are found. Here's all it does:
public function first($columns = array('*'))
{
$results = $this->take(1)->get($columns);
return count($results) > 0 ? reset($results) : null;
}
The difference to just using take(1) (or limit(1)) is that it actually just returns one result object, by calling reset(). (Also, first() obviously executes the query. The others don't)
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