Column not found: 1054 Unknown column using join

问题

I'm trying to retrieve the values based on the user's selected that I joined using first method. But when I tried to put the values in my form. It says

SQLSTATE[42S22]: Column not found: 1054 Unknown column 'sent_document_user.document.id' in 'on clause' (SQL: select documents.title, categories.category_type, documents.content, documents.id from sent_document_user inner join documents on documents.id = sent_document_user.document.id inner join categories on categories.id = documents.category_id where documents.id = 241 limit 1)``

I joined it properly I don't know why I can't retrieve the values that I selected. This is my code in SQL that works well.

SELECT D.title, C.category_type, D.content, D.id FROM sent_document_user SD
INNER JOIN documents D ON SD.document_id = D.id
INNER JOIN categories C ON D.category_id = C.id;

Controller

public function readSentDocuments($id)
{
  $documentLists = DB::table('sent_document_user')->select('documents.title', 'categories.category_type', 'documents.content', 'documents.id')
    ->join('documents', 'documents.id', '=', 'sent_document_user.document.id')
    ->join('categories', 'categories.id', '=', 'documents.category_id')
    ->where('documents.id', '=', $id)->first();

   return view ('document.readSent')->with('documentLists', $documentLists);
}

View

<div class = "form-group">

                    <label for = "title" class = "control-label">Title:</label>
                    <input type = "text" name = "title" class = "form-control" value = "{{ $documentLists->title }}">

                </div>

                <div class = "form-group">

                    <label for = "category" class = "control-label">Category:</label>
                    <input type = "text" name = "category" class = "form-control" value = "{{ $documentLists->category_type }}">

                </div>

                <div class = "form-group">

                    <textarea id = "content">{{ $documentLists->content }}</textarea>

</div>

回答1:

It seems you have an incorrect column name

 ->join('documents', 'documents.id', '=', 'sent_document_user.document.id')

Try sent_document_user.document_id instead of sent_document_user.document.id

回答2:

Typo:

->join('documents', 'documents.id', '=', 'sent_document_user.document.id')
                                                               here--^

Since that's a ., the DB server is interpreting it as dbname.tablename.fieldname, and you don't have a database named sent_document_user.

来源：https://stackoverflow.com/questions/38770088/column-not-found-1054-unknown-column-using-join

标签

php

laravel

join

laravel-5.2