I'm trying to fetch following things from the database:
user name
user avatar_name
user avatar_filetype
complete conversation_messages
with the following query:
static public function getConversation($id)
{
$conversation = DB::table('conversation_messages')
->where('belongsTo', $id)
->join('users', 'conversation_messages.sender', '=', 'users.id')
->join('user_avatars', 'conversation_messages.sender', '=', 'user_avatars.id')
->select('users.name', 'conversation_messages.*', 'user_avatars.name', 'user_avatars.filetype')
->get();
return $conversation;
}
It works fine so far, but the avatar's column name is 'name' like the column name from the 'users' table.
So if I'm using this query the to get the output via $conversation->name, the avatar.name overwrites the users.name
Is there a way to rename the query output like the mysql "as" feature at laravel 5.1?
For example:
$conversation->avatarName
$conversation->userName
Meh okay.. i've found a simple solution here
->select('users.name as userName', 'conversation_messages.*', 'user_avatars.name as avatarName', 'user_avatars.filetype')
As you can mention I've added the requested "as-Feature" next to the table.columnName
Take a look at this example of trying to join three tables staffs, customers and bookings(pivot table).
$bookings = \DB::table('bookings')
->join('staffs', 'staffs.id' , '=', 'bookings.staff_id')
->join('customers', 'customers.id' , '=', 'bookings.customer_id')
->select('bookings.id', 'bookings.start_time', 'bookings.end_time', 'bookings.service', 'staffs.name as Staff-Name', 'customers.name as Customer-Name')
->orderBy('customers.name', 'desc')
->get();
return view('booking.index')
->with('bookings', $bookings);
I had the following problem, simplified example:
$result = Donation::join('user', 'user.id', '=', 'donation.user_id')->where('user.email', 'hello#papabello.com')->first();
$result is a collection of Donation models. BUT CAREFUL:
both tables, have a 'created_at' column. Now which created_at is displayed when doing $result->created_at ? i don't know. It seems that eloquent is doing an implicit select * when doing a join, returning models Donation but with additional attributes. created_at seems random. So what I really wanted, is a return of all Donation models of the user with email hello#papabello.com
solution is this:
$result = Donation::select('donation.*')->join('user', 'user.id', '=', 'donation.user_id')->where('user.email', 'hello#papabello.com')->first();
Yeah, simply rename the column on either table and it should work.
Also what you can do is, rename the user.name column to anything, also rename sender column of conversation_messages to id and perform a natural join.
Related
I have the following query:
Ratings::join('users', 'movieratings.rated_by', '=', 'users.usr_id')
->where('rated_on', $movieId)
->orderBy('rated_at', 'desc')
->select('comment', 'rating', 'rated_as', 'rated_at', 'username')
->paginate(20);
This will get all the feedback ratings for a specific movie.
But I have another table which contains the total good and bad ratings for a specific movie movie, the only problem is that I cant get it to work to query that table as well at the same time.
If I do another query I would simply write: Movie::where('movie_id', $movieId)->select('total_good_ratings', 'total_bad_ratings')->get(); this would output eg "22, 15" but is it possible to only fetch two columns from a specific row then do a inner join between two tables and paginate the result?
thanks
You can do a leftJoin with the table that contains the good and bad ratings, where the join condition will be the id of the movie.
Ratings::join('users', 'movieratings.rated_by', '=', 'users.usr_id')
->leftJoin('movie', 'movie.id', '=', 'movieratings.rated_on')
->where('rated_on', $movieId)
->orderBy('rated_at', 'desc')
->select('comment', 'rating', 'rated_as', 'rated_at', 'username', 'total_good_ratings', 'total_bad_ratings')
->paginate(20);
I think you can try this:
Ratings::leftJoin('users', 'users.usr_id', '=', 'movieratings.rated_by')
->leftJoin('movie', 'movie.id', '=', 'movieratings.rated_on')
->where('movieratings.rated_on', $movieId)
->orderBy('movie.rated_at', 'desc')
->select('movieratings.comment', 'movieratings.rating', 'movieratings.rated_as', 'movie.rated_at', 'users.username', 'movieratings.total_good_ratings', 'movieratings.total_bad_ratings')
->paginate(20);
Hope this help for you !!!
In case this may be of help:
Assuming:
class Rating extends Model {
public users() {
$this->belongsTo(User::class, 'usr_id');
}
public movie() {
$this->belongsTo(Movie::class, 'rated_on'); //Name looks odd, it should be movie_id if you are following standard conventions
}
}
Then you can lazy/eaher load them:
$ratings = Ratings::with([ "movie" => function ($query) {
$q->select('total_good_ratings', 'total_bad_ratings');
}])->where('rated_on', $movieId)
->orderBy('rated_at', 'desc')
->select('comment', 'rating', 'rated_as', 'rated_at', 'username',"rated_on")
->paginate(20);
You can get the movie info via $ratings[X]->movie->total_good_ratings (in a loop that would be $rating->movie->total_good_ratings
A bit of critique though:
total_good_ratings looks like it's a derived attribute so it should not have been stored in the first place. It's appears to be a count of the good ratings.
You should use the standard conventions when naming columns and tables e.g. a foreign key is usually called <foreign table name in singular>_<foreign field name> example user_id or movie_id .
I need to select a table which contains id, name and some more. Now i want to select everything, but just change the column name 'name' to 'user_name'. How can i do this without selecting and declaring everything?
I tried it like this, but this is not working.
return $query
->select(
'user.*',
'user.name as user_name'
)
Your issue starts from your joins. Because you join without aliasing, then the second one overwrites the first. I give you a sample query to show how you can alias your joined table, and thus alias the 'name' from the second table. Sample code:
$query = DB::table('users')
->leftjoin('users as child', 'users.id', '=', 'users.parent_id')
->select('users.*', 'child.name as child_name')
->get();
I am trying to Select all non empty columns in 'user' table where column name is 'review'.
$applications = DB::table('users')
->join('applications', 'user.update_id', '=', 'applications.id')
->whereNotNull('users.review')
->select('user.id', 'user.rating', 'user.appid', 'user.review', 'applications.title', 'applications.price', 'applications.icon_uri')
->orderBy('user.id','asc')
->paginate(20);
$applications->setPath('');
return $applications;
But return data includes all information of both 'user.review' empty and not empty as well.
I feel there is no effect of whereNotNull() and i found no error in the statement.
I tried moving ->whereNotNull('user.review') this line top and bottom result is same.
I tried even by removing select and orderBy but returns same data.
$applications = DB::table('users')
->join('applications', 'user.update_id', '=', 'applications.id')
->whereNotNull('users.review')
->paginate(20);
$applications->setPath('');
return $applications;
Is there any way to make it work?
if your table is users you are missing an s in the table name, you should write
->whereNotNull('users.review')
same case in the join with the field update_id, otherwise you have to change the table name in the table method
I have two tables users and cars, the cars has a column owner that is the id of an user and I need to join them. Both users and cars has a column called name and it's overriding. I want to keep both but with different names, like car_name and user_name on the return.
Here is how I'm doing:
$columns = [
DB::raw('cars.name as car_name')
];
$cars = Cars::join('users', 'users.id', '=', 'cars.owner')->get($columns);
It works if I try to print car_name but it still overriding the name and if I print name it still returns the name of the user instead of the car.
Is there a way for doing this right?
You can use the select() clause directly in your query.. no need to use DB::raw():
$cars = Cars::join('users', 'users.id', '=', 'cars.owner')
->select('*','cars.name as car_name')
->get();
The problem with this is that you will end up with a repeated column as you are asking the DB for everything, plus the field with a new name. That may not be a problem for you, but might be better to specify explicitly the fields you want to select:
$cars = Cars::join('users', 'users.id', '=', 'cars.owner')
->select('users.name as user_name','cars.name as car_name', 'whatever_else')
->get();
I don't think you can do what you want with gets - but you can with select. This should hopefully work:
$columns = [
'*',
'users.name as user_name',
'cars.name as car_name'
];
$cars = Cars::join('users', 'users.id', '=', 'cars.owner')->select($columns)->get();
I have a table with email addresses and want to make a disctinct select (dont have duplicate email addresses in my result). The column with the email address is called 'mail_address'
I have tried:
ContactMail::distinct('mail_address')->get();
And:
ContactMail::distinct()->get();
But both give me just the complete table, also the rows where I have the same email address.
The complete query that I am building looks like this:
$list = ContactMail::where('campaign_id', '=', $campaign_id)
->where('mail_address', '!=', '')
->distinct('mail_address')
->get();
What am I doing wrong? I did not find good docu for distinct.
Using distinct in ORM is a bit pointless - in the end every model is distinct.
So I suggest, that you don't load the models, but single field that you need:
$list = ContactMail::where('campaign_id', '=', $campaign_id)
->where('mail_address', '!=', '')
->distinct()
->lists('email_address');
This way you get an array of distinct emails, instead of full models, or incomplete models when using select and get
$list = ContactMail::where('campaign_id', '=', $campaign_id)
->where('mail_address', '!=', '')
->select('mail_address')
->distinct()
->get();