Php LAVEL关系和使用push()方法
我试图找到一种不同的方法来将给定的模型及其关系保存/更新到数据库中 基本上,我有一个“作者”页面的表单,可以在其中添加多个“书籍”。自然,“作者”和“书籍”模型有一对多的关系 根据laravel官方教程,您必须:Php LAVEL关系和使用push()方法,php,laravel,laravel-4,eloquent,entity-relationship,Php,Laravel,Laravel 4,Eloquent,Entity Relationship,我试图找到一种不同的方法来将给定的模型及其关系保存/更新到数据库中 基本上,我有一个“作者”页面的表单,可以在其中添加多个“书籍”。自然,“作者”和“书籍”模型有一对多的关系 根据laravel官方教程,您必须: 将所有输入数据添加到“作者”模型 创建“Author”模型并将其保存到数据库中 对于每个“书本”输入数据 使用$author->books()->save($Book)创建每个“Book”模型并将其保存到数据库中 拉雷维尔还说 但是我找不到任何关于如何用“Book”关系填充“Autho
$author = new Author();
$author->name = "Bill Jobs";
$author->phone = "555 - 123456";
// fill model with relations
$author->addRelation($relationsArray)
if($author->push())
{
// ....
}
同样,更新“作者”时也应如此:首先删除已存储的关系,然后保存新关系,以便创建多个:
$author->books()->createMany($relationsArray);
首先删除已存储的关系,然后保存新的关系
然后
对于创建多个:
$author->books()->createMany($relationsArray);
首先删除已存储的关系,然后保存新的关系
然后
太长,读不下去了您将在下面找到push
说明,以及createMany
和saveMany
关系方法之间的区别
Eloqeunt不处理延迟关系(例如Doctrine2),即,您不能这样做:
$author = new Author;
$book = new Book;
$book->author()->associate($author);
$author->push();
因为关联是精确完成的,所以当您调用associate
方法时。它所做的就是:
$child->foreign_key = $parent->primary_key;
因此,在上述情况下,主键
为null
,因为$author
尚未保存
接下来,虽然
push
并不是说可以在文档中创建关联,但它可能会给人留下这样的印象,人们可能会尝试这样做:
$author = Author::first(); // existing parent
$books = Book::get(); // existing children collection
$author->books = $books;
$author->push();
然而,这将不起作用。首先,Eloquent不允许您显式地分配关系,如上所述,然后,即使您正确地分配关系,也不会建立关联:
$author = Author::first();
$books = Book::get();
$author->setRelation('books', $books);
$author->push();
这一次,关系被正确分配,但仍然没有建立关联(分配外键)。因此,尽管作者
和所有书籍
都将被保存/更新,但它们根本不会关联
也就是说,您需要自己关联模型,并使用
push
或利用雄辩的方法(createMany
/saveMany
):
首先:
$author = Author::find($someId);
// delete existing books
$author->books()->delete();
1然后手动:
// for example:
$booksInput = Input::get('books');
// validate etc
foreach ($booksInput as $bookArray)
{
$book = new Book;
// assign the value from, eg.
$book->fill($bookArray);
$book->author()->associate($author);
// or set FK explicitly
$book->author_id = $author->getKey();
// add to the author's collection
$author->books->add($book);
}
$author->push(); // saves author and each of the books in separate queries
$booksAsArrays = Input::get('books'); // array of arrays
// validation
$author->books()->createMany($booksAsArrays); // associate and save each book
$booksAsModels = []; // array of Book models
$booksAsArrays = Input::get('books'); // array of arrays
// validation
foreach ($booksAsArrays as $bookArray)
{
$booksAsModels[] = new Book($bookArray);
}
$author->books()->saveMany($booksAsModels); // associate and save each book
2或createMany
:
// for example:
$booksInput = Input::get('books');
// validate etc
foreach ($booksInput as $bookArray)
{
$book = new Book;
// assign the value from, eg.
$book->fill($bookArray);
$book->author()->associate($author);
// or set FK explicitly
$book->author_id = $author->getKey();
// add to the author's collection
$author->books->add($book);
}
$author->push(); // saves author and each of the books in separate queries
$booksAsArrays = Input::get('books'); // array of arrays
// validation
$author->books()->createMany($booksAsArrays); // associate and save each book
$booksAsModels = []; // array of Book models
$booksAsArrays = Input::get('books'); // array of arrays
// validation
foreach ($booksAsArrays as $bookArray)
{
$booksAsModels[] = new Book($bookArray);
}
$author->books()->saveMany($booksAsModels); // associate and save each book
3或saveMany
:
// for example:
$booksInput = Input::get('books');
// validate etc
foreach ($booksInput as $bookArray)
{
$book = new Book;
// assign the value from, eg.
$book->fill($bookArray);
$book->author()->associate($author);
// or set FK explicitly
$book->author_id = $author->getKey();
// add to the author's collection
$author->books->add($book);
}
$author->push(); // saves author and each of the books in separate queries
$booksAsArrays = Input::get('books'); // array of arrays
// validation
$author->books()->createMany($booksAsArrays); // associate and save each book
$booksAsModels = []; // array of Book models
$booksAsArrays = Input::get('books'); // array of arrays
// validation
foreach ($booksAsArrays as $bookArray)
{
$booksAsModels[] = new Book($bookArray);
}
$author->books()->saveMany($booksAsModels); // associate and save each book
太长,读不下去了您将在下面找到push
说明,以及createMany
和saveMany
关系方法之间的区别
Eloqeunt不处理延迟关系(例如Doctrine2),即,您不能这样做:
$author = new Author;
$book = new Book;
$book->author()->associate($author);
$author->push();
因为关联是精确完成的,所以当您调用associate
方法时。它所做的就是:
$child->foreign_key = $parent->primary_key;
因此,在上述情况下,主键
为null
,因为$author
尚未保存
接下来,虽然
push
并不是说可以在文档中创建关联,但它可能会给人留下这样的印象,人们可能会尝试这样做:
$author = Author::first(); // existing parent
$books = Book::get(); // existing children collection
$author->books = $books;
$author->push();
然而,这将不起作用。首先,Eloquent不允许您显式地分配关系,如上所述,然后,即使您正确地分配关系,也不会建立关联:
$author = Author::first();
$books = Book::get();
$author->setRelation('books', $books);
$author->push();
这一次,关系被正确分配,但仍然没有建立关联(分配外键)。因此,尽管作者
和所有书籍
都将被保存/更新,但它们根本不会关联
也就是说,您需要自己关联模型,并使用
push
或利用雄辩的方法(createMany
/saveMany
):
首先:
$author = Author::find($someId);
// delete existing books
$author->books()->delete();
1然后手动:
// for example:
$booksInput = Input::get('books');
// validate etc
foreach ($booksInput as $bookArray)
{
$book = new Book;
// assign the value from, eg.
$book->fill($bookArray);
$book->author()->associate($author);
// or set FK explicitly
$book->author_id = $author->getKey();
// add to the author's collection
$author->books->add($book);
}
$author->push(); // saves author and each of the books in separate queries
$booksAsArrays = Input::get('books'); // array of arrays
// validation
$author->books()->createMany($booksAsArrays); // associate and save each book
$booksAsModels = []; // array of Book models
$booksAsArrays = Input::get('books'); // array of arrays
// validation
foreach ($booksAsArrays as $bookArray)
{
$booksAsModels[] = new Book($bookArray);
}
$author->books()->saveMany($booksAsModels); // associate and save each book
2或createMany
:
// for example:
$booksInput = Input::get('books');
// validate etc
foreach ($booksInput as $bookArray)
{
$book = new Book;
// assign the value from, eg.
$book->fill($bookArray);
$book->author()->associate($author);
// or set FK explicitly
$book->author_id = $author->getKey();
// add to the author's collection
$author->books->add($book);
}
$author->push(); // saves author and each of the books in separate queries
$booksAsArrays = Input::get('books'); // array of arrays
// validation
$author->books()->createMany($booksAsArrays); // associate and save each book
$booksAsModels = []; // array of Book models
$booksAsArrays = Input::get('books'); // array of arrays
// validation
foreach ($booksAsArrays as $bookArray)
{
$booksAsModels[] = new Book($bookArray);
}
$author->books()->saveMany($booksAsModels); // associate and save each book
3或saveMany
:
// for example:
$booksInput = Input::get('books');
// validate etc
foreach ($booksInput as $bookArray)
{
$book = new Book;
// assign the value from, eg.
$book->fill($bookArray);
$book->author()->associate($author);
// or set FK explicitly
$book->author_id = $author->getKey();
// add to the author's collection
$author->books->add($book);
}
$author->push(); // saves author and each of the books in separate queries
$booksAsArrays = Input::get('books'); // array of arrays
// validation
$author->books()->createMany($booksAsArrays); // associate and save each book
$booksAsModels = []; // array of Book models
$booksAsArrays = Input::get('books'); // array of arrays
// validation
foreach ($booksAsArrays as $bookArray)
{
$booksAsModels[] = new Book($bookArray);
}
$author->books()->saveMany($booksAsModels); // associate and save each book
您可以使用推送方法更新图书和作者模型
$book = Book::first();
$book->author->author_name = "Mark Twin";
$book->book_name = "Life On The Mississippi";
$book->push();
这里是详细信息的链接
[1] :您可以使用推送方法更新图书和作者模型
$book = Book::first();
$book->author->author_name = "Mark Twin";
$book->book_name = "Life On The Mississippi";
$book->push();
这里是详细信息的链接
[1] :