不允许从数据类型varchar（max）隐式转换为varbinary（max）。 使用CONVERT函数运行此查询

Question

I'm using MySQL in development, storing base64 image in longblob data type.

But I'm getting error below when trying to insert data after I changed database to MS SQL & data type to varbinary(max)

Implicit conversion from data type varchar(max) to varbinary(max) is not allowed. Use the CONVERT function to run this query

So I put a mutator to get this around as below,

public function setItemPictureAttribute($value)
{
    $this->attributes['item_picture'] = DB::raw('CONVERT(VARBINARY(MAX), "'. $value .'")');
}

but I'm getting error below when trying to store the base64 image;

The identifier that starts with '/9j/4QxnRXhpZgAATU0AKgAAAAgABwESAAMAAAABAAEAAAEaAAUAAAABAAAAYgEbAAUAAAABAAAAagEoAAMAAAABAAMAAAExAAIAAAAeAAAAcgEyAAIAAAAUAAAAkIdp' is too long. Maximum length is 128`

What did I miss?

EDIT: Somehow I got this work after I changed to $this->attributes['item_picture'] = DB::raw("CONVERT(VARBINARY(MAX), '". $value ."')"); ; notice that I switched the double quote with single quote and vice versa in DB::raw . Maybe someone can explain why

Answer 1

Somehow I got this work after I changed to

$this->attributes['item_picture'] = DB::raw("CONVERT(VARBINARY(MAX), '". $value ."')");; 

notice that I switched the double quote with single quote and vice versa in DB::raw . Maybe someone can explain why