I have a model called School and it has many Students .
我有一个名为School的模型,它有很多学生。
Here is the code in my model:
这是我模型中的代码:
public function students()
{
return $this->hasMany('Student');
}
I am getting all the students with this code in my controller:
我正在让所有学生在我的控制器中使用此代码:
$school = School::find($schoolId);
and in the view:
并在视图中:
@foreach ($school->students as $student)
Now I want to order the Students by some field in the students
table. How can I do that?
现在我想通过学生表中的某个字段订购学生。我怎样才能做到这一点?
3 个解决方案
#1
32
You have a few ways of achieving this:
您有几种方法可以实现此目的:
// when eager loading
$school = School::with(['students' => function ($q) {
$q->orderBy('whateverField', 'asc/desc');
}])->find($schoolId);
// when lazy loading
$school = School::find($schoolId);
$school->load(['students' => function ($q) {
$q->orderBy('whateverField', 'asc/desc');
}]);
// or on the collection
$school = School::find($schoolId);
// asc
$school->students->sortBy('whateverProperty');
// desc
$school->students->sortByDesc('whateverProperty');
// or querying students directly
$students = Student::whereHas('school', function ($q) use ($schoolId) {
$q->where('id', $schoolId);
})->orderBy('whateverField')->get();
#2
5
To answer the original question, the students
dynamic property can also be accessed as a relationship method.
要回答原始问题,学生动态属性也可以作为关系方法访问。
So you have this to fetch all students:
所以你有这个来取得所有学生:
$students = $school->students;
Now as a relationship method, this is equivalent:
现在作为一种关系方法,这是等价的:
$students = $school->students()->get();
Given this, you can now add in some ordering:
鉴于此,您现在可以添加一些顺序:
$students = $school->students()->orderBy('students.last_name')->get();
Since eloquent will be performing a join, make sure to include the table name when referencing the column to order by.
由于eloquent将执行连接,因此请确保在引用要排序的列时包含表名。
You can also add this to your students
method if you want to set a default order that $school->students
will always return. Check out the documentation for hasMany()
to see how this works.
如果您想设置$ school->学生将始终返回的默认顺序,您也可以将其添加到学生方法中。查看hasMany()的文档,了解其工作原理。
#3
5
you can add orderBy to your relation, so the only thing you need to change is
你可以为你的关系添加orderBy,所以你唯一需要改变的是
public function students()
{
return $this->hasMany('Student');
}
to
public function students()
{
return $this->hasMany('Student')->orderBy('id', 'desc')
}
#1
32
You have a few ways of achieving this:
您有几种方法可以实现此目的:
// when eager loading
$school = School::with(['students' => function ($q) {
$q->orderBy('whateverField', 'asc/desc');
}])->find($schoolId);
// when lazy loading
$school = School::find($schoolId);
$school->load(['students' => function ($q) {
$q->orderBy('whateverField', 'asc/desc');
}]);
// or on the collection
$school = School::find($schoolId);
// asc
$school->students->sortBy('whateverProperty');
// desc
$school->students->sortByDesc('whateverProperty');
// or querying students directly
$students = Student::whereHas('school', function ($q) use ($schoolId) {
$q->where('id', $schoolId);
})->orderBy('whateverField')->get();
#2
5
To answer the original question, the students
dynamic property can also be accessed as a relationship method.
要回答原始问题,学生动态属性也可以作为关系方法访问。
So you have this to fetch all students:
所以你有这个来取得所有学生:
$students = $school->students;
Now as a relationship method, this is equivalent:
现在作为一种关系方法,这是等价的:
$students = $school->students()->get();
Given this, you can now add in some ordering:
鉴于此,您现在可以添加一些顺序:
$students = $school->students()->orderBy('students.last_name')->get();
Since eloquent will be performing a join, make sure to include the table name when referencing the column to order by.
由于eloquent将执行连接,因此请确保在引用要排序的列时包含表名。
You can also add this to your students
method if you want to set a default order that $school->students
will always return. Check out the documentation for hasMany()
to see how this works.
如果您想设置$ school->学生将始终返回的默认顺序,您也可以将其添加到学生方法中。查看hasMany()的文档,了解其工作原理。
#3
5
you can add orderBy to your relation, so the only thing you need to change is
你可以为你的关系添加orderBy,所以你唯一需要改变的是
public function students()
{
return $this->hasMany('Student');
}
to
public function students()
{
return $this->hasMany('Student')->orderBy('id', 'desc')
}