Laravel 4: How to access data from belongsTo() relationship? - php

Question

// models:
class Hometype extends Eloquent {
public function development() {
return $this->belongsTo('Development');
}
}
class Development extends Eloquent {
public function hometypes() {
return $this->hasMany('Hometype', 'dev_id');
}
}
with that, I can do:
// controller:
$development = Development::where('stuff')->first();
// view:
#foreach ($development->hometypes as $hometype)
{{ $hometype->stuff }}
#endforeach
which is perfectly lovely.
but I can't seem to do:
// controller:
$hometype = Hometype::where('stuff')->first();
// view:
{{ $hometype->development->stuff }} // <- fails
How do I access a field on the parent Development model from within $hometype?
I'm resorting to:
'development' => Development::find($hometype->dev_id),
which seems silly.
Possible duplicate of: Laravel 4 - Can't retrieve data in a one-to-many relationship, but I'm not camelCasing...
Also similar to: Laravel 4 hasOne / belongsTo relationship (no answers here)

Answer 1

As I can see, there might be two problems:
The foreign key in Hometype is wrong (if you're using a different column name than "column"_id then you have to specify it)
You might be fetching a Hometype record whose development row doesn't exist

Answer 2

Accessing data and methods between hasMany and belongsTo
First get required models and then loop through
These are the model:
class ExpenseCategory extends Model
public function expense_transactions()
{
return $this->hasMany('App\ExpenseTransaction');
}
class ExpenseTransaction extends Model
public function expense_category()
{
return $this->belongsTo('App\ExpenseCategory');
}
Schema for the above model:
Schema::create('expense_transactions', function (Blueprint $table) {
$table->increments('id');
$table->unsignedInteger('expense_category_id')->nullable();
$table->unsignedInteger('day_sheet_id')->nullable();
$table->string('expense_title')->nullable();
$table->unsignedInteger('amount');
$table->timestamps();
$table->foreign('expense_category_id')
->references('id')->on('expense_categories')
->onDelete('cascade');
$table->foreign('day_sheet_id')
->references('id')->on('day_sheets')
->onDelete('cascade');
Schema for category:
Schema::create('expense_categories', function (Blueprint $table) {
$table->increments('id');
$table->string('name');
$table->timestamps();
});
find only expense transactions for day sheet id in model
$expenseTransactions = ExpenseTransaction::where('day_sheet_id', $id)->get();
show their category name
access in blade:
in a foreach loop
#foreach($expense_transactions as $expense_transaction)
{{ $expense_transaction->expense_category->name }}