Isolate Key/Value Pair from Laravel Model Relationship - php

Question

In my Laravel App, a poll has many poll options. I can create a collection of those options by simply running:
$result = Poll::find(1)->options()->get();
This query returns:
Collection {#387 ▼
#items: array:6 [▼
0 => PollOption {#388 ▼
#table: "poll_options"
#connection: null
#primaryKey: "id"
#keyType: "int"
#perPage: 15
+incrementing: true
+timestamps: true
#attributes: array:8 [▼
"id" => 1
"poll_id" => 1
"option_text" => "Never"
"responses" => 54
"is_public" => 0
"created_at" => null
"updated_at" => null
"deleted_at" => null
]
#original: array:8 [▶]
#relations: []
#hidden: []
#visible: []
#appends: []
#fillable: []
#guarded: array:1 [▶]
#dates: []
#dateFormat: null
#casts: []
#touches: []
#observables: []
#with: []
#morphClass: null
+exists: true
+wasRecentlyCreated: false
}
1 => PollOption {#389 ▶}
2 => PollOption {#390 ▶}
3 => PollOption {#391 ▶}
]
}
Within my poll option, there is a column called responses, which returns an integer. I need to take the collection above and isolate the responses key/value pair.
Collection {#385 ▼
#items: array:6 [▼
"responses" => 54
"responses" => 20
"responses" => 10
"responses" => 123
"responses" => 33
"responses" => 11
]
}
The only() collection method does exactly what I need, but I can't figure out how to structure the query when working with Eloquent models:
$options = Poll::find(1)->options()->get();
$responses = $options->only('responses');
dd($responses->all());
Returns an empty collection because the responses value is nested within the PollOption object.
I've also tried flatten(), but that seems to have no effect in this scenario.
Is there an easier way to return a single key/value pair within an Eloquent model collection?

Answer 1

It's not actually possible to assign the same key to multiple values within a collection. I knew this, but I wasn't thinking the problem through properly.
For future devs: the pluck() method takes two arguments: the value you want to pluck, and a second value that gets assigned to the key. Using the scenario above, I was able to write:
$result = $poll->options()->pluck('responses', 'option_text'); //Value and corresponding key
This results in something like:
Collection {#386 ▼
#items: array:6 [▼
"Never" => 54
"Occasionally" => 21
"2–3 times a week" => 80
"4–5 times per week" => 33
"Daily" => 11
]
}
Which ultimately did what I need it to do. Amit Gupta's mapWithKeys() answer is also correct, and will land you in the same place.