The problem started because I have a table (Clientes), in which the primary key is not auto-incremental. I want to select the max value stored in a column database.
Like this select, but with eloquent ORM (Laravel):
SELECT MAX(Id) FROM Clientes
How can I do this?
I tried:
Cliente::with('id')->max(id);
Cliente::select('id')->max(id);
I prefer not to make a simple raw SELECT MAX(ID) FROM Clientes
I cannot make it.
Thanks all!
The correct syntax is:
Cliente::max('id')
https://laravel.com/docs/5.5/queries#aggregates
Laravel makes this very easy, in your case you would use
$maxValue = Cliente::max('id');
But you can also retrieve the newest record from the table, which will be the highest value as well
$newestCliente = Cliente::orderBy('id', 'desc')->first(); // gets the whole row
$maxValue = $newestCliente->id;
or for just the value
$maxValue = Cliente::orderBy('id', 'desc')->value('id'); // gets only the id
Or, if you have a created_at column with the date you could get the value like this
$maxValue = Cliente::latest()->value('id');
Relevant Laravel Documentation: https://laravel.com/docs/5.5/queries#aggregates
$maxValue = DB::table('Clientes')->max('id');
Cliente::where('column_name', $your_Valu)->max('id') // You get any max column
We can use the following code :
$min_id = DB::table('table_name')->max('id');
https://laravel.com/docs/8.x/queries#aggregates
Related
I want return specific columns for every card that is returned by eloquent relationship.
I can do it with ->get(['column1', 'column2']) but in this situation I can't use get().
Is there a solution for this ?
$deckId = $request->deckId;
$deck = Deck::find($deckId);
return $deck->cards;
on the cards I want for example just the id the name and the card_type
This code should work if you already defined the relationship
return $deck->cards()->get(['id', 'name', 'card_type']);
Have you looked into pluck?
Deck::all()->pluck('column1', 'column2');
This will return an array with column1 as key and column2 as value
I'm trying to update a single row,
using this query,
$update_row = PayRecord::where('date_from',$date_from)
->where->('date_to',$date_to)
->update(['status',1]);
what I want to do is to get the id of the updated row, without creating another query to get the id,
$get_updated_row_id = PayRecord::where('date_from',$date_from)
->where->('date_to',$date_to)'
->get('id');
Thank You,
Remove extra -> from where clause.
This may useful to you.
$update_row = PayRecord::where('date_from',$date_from)
->where('date_to',$date_to)
->first();
$update_row->update(['status',1]);
$update_row->id; // to get the id
Im using Eloquent. But I'm having trouble understanding Eloquent syntax. I have been searching, and trying this cheat sheet: http://cheats.jesse-obrien.ca, but no luck.
How do i perform this SQL query?
SELECT user_id FROM notes WHERE note_id = 1
Thanks!
If you want a single record then use
Note::where('note_id','1')->first(['user_id']);
and for more than one record use
Note::where('note_id','1')->get(['user_id']);
If 'note_id' is the primary key on your model, you can simply use:
Note::find(1)->user_id
Otherwise, you can use any number of syntaxes:
Note::where('note_id', 1)->first()->user_id;
Note::select('user_id')->where('note_id', 1)->first();
Note::whereNoteId(1)->first();
// or get() will give you multiple results if there are multiple
Also note, in any of these examples, you can also just assign the entire object to a variable and just grab the user_id attribute when needed later.
$note = Note::find(1);
// $user_id = $note->user_id;
I want to get custom column with custom value with each row selection of table using codeigniter active record. In normal MySql selection query i can do that, but using active record custom column is unknown. SO how to do that? for any help thanks.
$this->db->select('name,\'custom_col\'')->from('my_table')->get();
You can do like this:
$this->db->select("'custom_col',name",FALSE)->from('my_table')->get();
$this->db->select('title, content, date');
$query = $this->db->get('mytable');
You can also do like this
$this->db->select('(SELECT SUM(payments.amount) FROM payments WHERE payments.invoice_id=4') AS amount_paid', FALSE);
$query = $this->db->get('mytable');
Check this link
https://ellislab.com/codeigniter/user-guide/database/active_record.html#select
I'm trying to update a record just after I get it from database.
$item = Model::find($id);
$item->field = 'foo';
$item->save();
it do finds the requested record, but the query generated to update the record is not correct:
update `Models` set `field` = ? where `id` is null
I don't know why this is happening!
what is wrong ?
Update:
I just renamed the primary-Key from ID to id in the database table. and then it worked! I didn't know it's case-sensitive
update `bannerads_orders` set `ViewedCount` = ? where `id` = ?
Well, I found the problem. as Laravel documents says:
Note: Eloquent will also assume that each table has a primary key
column named id. You may define a primaryKey property to override this
convention
but in my table it was ID not id. so after I changed it to id, everything works as expected.
Laravel uses prepared statements. There is nothing wrong with this. Additionally you don't actually specify an error.
You should probably use in this case:
$item = Model::findOrfail($id);
$item->field = 'foo';
$item->save();
It seems that $id might be null or user cannot be found and than saving it doesn't make any sense.
If user is not found exception will be thrown and this save won't be executed