I'm trying to return all the attributes from my database that have a set foreign key (Attribute groups). I've set up all the relationships in my model but I'm unsure how to query these relationships using a collection or array.
AttributeGroup -
public function attribute()
{
return $this->hasMany('App\Attribute', 'group_id');
}
Attribute -
public function attributeGroup()
{
return $this->belongsTo('App\AttributeGroup');
}
My current query -
$page = Page::where('slug', $slug)->firstOrFail();
$groups = AttributeGroup::where('page_id', $page->id)->get()->toArray();
$atts = Attribute::where('group_id', $groups[0]['id'])->get();
This works because we have set the specific index of the array using $groups[0]
Is there a simple way I can pass an array through to the query using their relationships or is looping through the results and then passing my own array to the query the best approach?
$attributes = array();
foreach ($groups as $group){
array_push($attributes, $group['id']);
}
$atts = Attribute::where('group_id', $attributes)->get();
$groups is a collection. Assume them as arrays on steroids. Therefore you can use the pluck() method to get those ids you need:
$page = Page::where('slug', $slug)->firstOrFail();
$groups = AttributeGroup::where('page_id', $page->id)->get();
$atts = Attribute::where('group_id', $groups->pluck('id'))->get();
Also if you've set your relationships correctly, you should be able to loop through $groups and access the attributes of those $groups. You can test it:
$groups = AttributeGroup::where('page_id', $page->id)->get();
dd($groups->first()->attributes);
Related
I have 2 table which name incomes and expenses and I want to show all the data in one view with laravel pagination. For this, I Merged two array with array_merge().
$incomes = Income::where('user_id', Auth::User()->id)->get()->toArray();
$expenses = Expense::where('user_id', Auth::User()->id)->get()->toArray();
foreach ($incomes as $key => $value) {
$incomes[$key]['type'] = 'income';
}
foreach ($expenses as $key => $value) {
$expenses[$key]['type'] = 'expense';
}
$results = array_merge($incomes, $expenses);
How can I paginate this $results?
You can do this in two ways:
Laravel's built in manually creating a paginator functionality.
Get the results from tables using UNION.
Using UNION
$incomes = Income::where('user_id', Auth::User()->id);
$data = Expense::where('user_id', Auth::User()->id)->union($incomes)->paginate(10);
For manually creating a paginator, please see https://laravel.com/docs/6.x/pagination#manually-creating-a-paginator
Add the following to Income Model
protected $appends = ['type'];
public function getTypeAttribute()
{
return 'Income';
}
Add the following to Expense Model
protected $appends = ['type'];
public function getTypeAttribute()
{
return 'Expense';
}
This will add the type key in the query results.
I want to combine two data search results into one array, I use array_merge but there is an array_merge() error:
Argument # 1 is not an array
How to turn $vendor's eloquent results into an array and combine it with $plucked?
$vendor = Vendor::find($id);
$vendor_detail = VendorDetail::where('vendor_id',$id)->get();
$plucked = $vendor_detail->pluck('vendor_profile_value','vendor_profile_name');
$coba = array_merge($vendor,$plucked);
$plucked already an array
I think the problem here is that $vendor is not yet an array
You could do it like this:
$vendor = Vendor::find($id);
$vendor_details = VendorDetail
::select('vendor_profile_value', 'vendor_profile_name')
->where('vendor_id', $id)
->get()
->toArray();
$coba = array_merge($vendor,$vendor_details);
The get() method execute the query returning a Collection instance, in which you can call the toArray() method.
Side note
As far as I can see, you could make use of relationships and eager loading.
If you have a one-to-many relationship defined like this in your Vendor model:
public function details()
{
return $this->hasMany(VendorDetails::class);
}
Then, you could eager load the relationship like this:
$vendor = Vendor::with('details')->find($id);
// ^^^^^^^^^^^^^^
You could even just load the wanted fields:
$vendor = Vendor::with('details:vendor_profile_value,vendor_profile_name')
->find($id);
Then, your object will have a new attribute called "details" containing the related objects (or a collection of the limited selected fields).
You can convert the $vendor to an Array like below.
$vendor = Vendor::find($id)->toArray();
How do I get the key from a collection item?
$posts= Post::all();
Example (doesn't work):
$key = $posts->where('id', $id)->getKey();
The all() will return a collection without keys. If you're talking about integer keys like 0, 1, 2 etc, use the search() method:
$key = $posts->search(function($i) use($id) {
return $i->id === $id;
});
Try $post_ids = Post::pluck('id');
That grabs just the id column from all the Post records and returns them as a collection.
If you want just a plain array, add toArray():
$post_ids = Post::pluck('id')->toArray();
Let's say I have a model collection that I'm mapping through like this:
$alreadyImported = [];
$players = Players::whereNotIn('id', $alreadyImported)
->get()
->random(25)
->pluck('id');
$groups = $players->map(function ($item, $key) use ($alreadyImported) {
array_merge($alreadyImported, $item->id);
$group = [
'username' => $item['username'],
];
return $group;
});
// $groups is a pivot table with group and players
Why does my $globalList always start at []? How can I carry the already-merged $globalList to the next map iteration?
The player IDs does not matter. It's for show. I am looking to pass the array through the map iterations.
Just use pluck() to get IDs from the collection:
$ids = $players->pluck('id');
Or, if you just need IDs:
$ids = Players::where('banned', false)->pluck('id');
If you're going to add any other data, you don't need to merge it to some array or a collection because map() will create a new collection.
Finally, you don't need to use collect() because get() will return collection.
Here is my code$titles = DB::table('roles')->lists('title');
How Can I cast $titles from a Laravel 5 collection into an associative array?
Include the ID in the function, and call from the Model:
$titles = Role::lists('title', 'id')->toArray();
Or call directly as you are doing:
$titles = DB::table('roles')->lists('title', 'id');
In this case, in an select field for example, the id will be the option value.
A laravel collection has a toArray method that will return a numerically keyed array of the contents. (The indexes will be keyed exactly as they are in the collection. To reset them call values on the collection first.)
$titles = DB::table('roles')->lists('title');
$result = $titles->toArray();
For an associative array you will need to do this manually using something like this.
$titles = DB::table('roles')->lists('title', 'id');
$result = [];
foreach($titles as $title) {
// using an ID as the key and title as the value
$result[$title->id] = $title->title;
}