Laravel 4查询生成器-未找到非空列

Question

Route::get('/test', function(){
    return DB::table('table')->where_not_null('column')->get();
});

In Laravel 4 I have the following route, obviously with table and column replaced. I had it in the controller but it wasn't working, so I moved it to a test route.

The error I am getting is:

SQLSTATE[42S22]: Column not found: 1054 Unknown column '_not_null' in 'where clause' (SQL: select * from `table` where `_not_null` = column)

https://tower.la.utexas.edu/docs/database/fluent#where

Documentation says:

return DB::table('table')->where_null('column')->get();

Answer 1

It should be

return DB::table('table')->whereNull('column')->get();

Or

return DB::table('table')->whereNotNull('column')->get();

You have used where_not_null .This is the right reference .

Answer 2

请参阅相应的文章： http : //laravel.com/docs/queries#selects

DB::table('table')->whereNotNull('column')->get();

Answer 3

The documentation states that following the table declaration you should put the query builder information, where_null, where_not_null, where_in.

However that doesn't work. I'm not sure why, it makes no sense, and is frustrating. However, this does work.

    return DB::table('user')->whereuserName('not_null')->get();

By placing the column name where the documentation says to put the query, and the query where the documentation says to put the column you are able to execute your query. To note, camel case is converted to snake case in the query, so the column has to be named user_name.

I am posting this because I attempted googling it and was not able to find anything.