I am new to codeigniter. In my project I am getting some data from database and then showing them using codeigniter table->generate method. But I want to add an autoincrement column (like 1,2,3..) to show the row number in an additional column at the left of the table. Also, beside the number there will be checkbox to mark the row. Can anybody give me idea how can I do it in codeigniter?
You could add a count to your SQL query so that it is returned along with your results:
SET #n=0; SELECT #n := #n+1, * FROM example_table
Alternatively you could add the count to each result in PHP:
$count = 1;
foreach($results as $key => &$result){
array_push($result, $count);
$count++;
}
echo $this->table->generate($results);
Related
I have 2 tables with the same columns except the second table have one more column, this column is foreign key of the first;
what i want is to make union query;but for union the column must the same; so i want to select all column except for the column distinct;
The easy way is to provide in select all the same column:
$a = Table1::select(['column1', 'column2', 'etc...']);
$b = Table2::select(['column1', 'column2', 'etc...']);
and go with $a->union($b)->get();
but if i have too much column, i end up with so much column to provide in the select function; so what i want is to provide in the query the column that i don't want to retrieve;
i can put protected $hidden in the second table model but for some reason i need this distinct column on some other query;
Get all columns name by Schema::getColumnListing($table);
And computes the intersection of arrays
array_intersect($columnsName1, $columnsName2);
I haven't done it with 2 tables but I am using collections and rejecting certain columns on a similar project:-
$row = Table1::firstOrFail();
$exclude=['column_1', 'column_2'];
return collect(array_keys($row->getAttributes()))
->reject(function ($name) use ($row, $exclude) {
return in_array($name, $row->getHidden())
|| in_array($name, $exclude);
}
);
When querying a product code table I have the following
$results = Stock::orderBy('stk_physical', 'desc')->paginate(10);
This works fine on the initial load of 10 records but when a subsequent call is made for page 2 I get the following error
Incorrect syntax near 'offset'. (SQL: select * from [stock_records] order by [stk_physical] desc offset 10 rows fetch next 10 rows only)
I'm using Laravel 8.0 with SQL
You should append query string to the pagination like this
$results = Stock::orderBy('stk_physical', 'desc')->paginate(10);
$results->appends(["order_by" => "stk_physical"]);
This will append the &order_by=stk_physical to each link in the view and you can also use withQueryString() to take in consideration query string in future pagination like this
$results = Stock::orderBy('stk_physical', 'desc')->paginate(10)->withQueryString();
I tried looking for a similar example to my problem but could not reproduce the solution to my success.
I have 2 tables, Controller and Actions.
The Actions table has the columns Step, Script, Description, Wait_Until and Ref_Code.
The Controller table can only be joined on the Action table by the Ref_Code.
The Action table cannot have a PK because for each Ref_Code there is a Step to be taken.
Im getting an error when trying to update the Controller table using a merge statement:
ORA-30926: unable to get a stable set of rows in the source tables
My merge statement is as follows:
MERGE INTO DSTETL.SHB_FTPS_CONTROLLER ftpsc
USING (SELECT DISTINCT FTPSC.SESSION_ID,
FTPSC.ORDER_DATE,
sa.step,
sa.next_step,
LAST_ACTION_TMSTMP,
SA.ACTION_SCRIPT,
sa.ref_code,
SA.WAIT_UNTIL
FROM DSTETL.SHB_FTPS_CONTROLLER ftpsc, DSTETL.SHB_ACTIONS sa
WHERE SA.REF_CODE = FTPSC.REF_CODE
AND SA.STEP > ftpsc.curr_step
AND sa.step = ftpsc.next_step) v1
ON (v1.REF_CODE = FTPSC.REF_CODE)
WHEN MATCHED
THEN
UPDATE SET FTPSC.LAST_ACTION_TMSTMP = CURRENT_TIMESTAMP,
ftpsc.next_step = v1.next_step,
ftpsc.curr_step = v1.STEP,
ftpsc.action_script = v1.action_script
WHERE CURRENT_TIMESTAMP >= v1.LAST_ACTION_TMSTMP + v1.WAIT_UNTIL;
COMMIT;
I tried doing this using a normal update as well but Im getting ORA-01732: data manipulation operation not legal on this view.
UPDATE (SELECT FTPSC.SESSION_ID,
FTPSC.ORDER_DATE,
FTPSC.CURR_STEP,
FTPSC.NEXT_STEP,
FTPSC.ACTION_SCRIPT,
sa.step, --New Step
sa.next_step AS "NNS", --New Next Step
FTPSC.LAST_ACTION_TMSTMP,
SA.ACTION_SCRIPT AS "NAS", --New action script
sa.ref_code,
SA.WAIT_UNTIL
FROM DSTETL.SHB_FTPS_CONTROLLER ftpsc
LEFT JOIN
DSTETL.SHB_ACTIONS sa
ON SA.REF_CODE = FTPSC.REF_CODE
AND SA.STEP > ftpsc.curr_step
AND sa.step = ftpsc.next_step) t
SET t.curr_step = t.step,
t.LAST_ACTION_TMSTMP = CURRENT_TIMESTAMP,
t.next_step = t."NNS",
t.action_script = t."NAS";
COMMIT;
Any advice would be appreciated, I already understand this is because the Action table has multiple Ref_Codes but REF_CODE||STEP is unique. And the output of:
SELECT DISTINCT FTPSC.SESSION_ID,
FTPSC.ORDER_DATE,
sa.step,
sa.next_step,
LAST_ACTION_TMSTMP,
SA.ACTION_SCRIPT,
sa.ref_code,
SA.WAIT_UNTIL
FROM DSTETL.SHB_FTPS_CONTROLLER ftpsc, DSTETL.SHB_ACTIONS sa
WHERE SA.REF_CODE = FTPSC.REF_CODE
AND SA.STEP > ftpsc.curr_step
AND sa.step = ftpsc.next_step;
Is how I want the Controller table to be updated like.
Thanks in advance.
It sounds like what you want to do is: update each row in the Controller table with the matching "next step" details from the Actions table. But your Merge statement is querying the Controller table twice, which confuses things.
Is this what you're trying to do?
MERGE INTO DSTETL.SHB_FTPS_CONTROLLER ftpsc
USING (SELECT
step,
next_step,
ACTION_SCRIPT,
ref_code,
WAIT_UNTIL
FROM DSTETL.SHB_ACTIONS
) sa
ON (sa.REF_CODE = FTPSC.REF_CODE)
WHEN MATCHED
THEN
UPDATE SET FTPSC.LAST_ACTION_TMSTMP = CURRENT_TIMESTAMP,
ftpsc.next_step = sa.next_step,
ftpsc.curr_step = sa.STEP,
ftpsc.action_script = sa.action_script
WHERE CURRENT_TIMESTAMP >= ftpsc.LAST_ACTION_TMSTMP + sa.WAIT_UNTIL
AND SA.STEP > ftpsc.curr_step
AND sa.step = ftpsc.next_step;
EDIT: updated query
EDIT2: So, in your original query, in the USING section you were selecting the rows in the Controller table that you wanted to update... but you never joined those rows to the Controller table from the MERGE INTO section to match them up. Having the same alias "ftpsc" just made it less clear that they're two separate objects in the query, and which one you wanted to update.
Honestly I don't really understand why Oracle won't let you update columns that appear in the USING..ON clause. It apparently works fine in SQL Server.
I'm using datatables with server side processing in a Laravel project. My status column is integer, which is then formatted
->editColumn('status', function($orders) use ($statuses) {
return $statuses[$orders->status];
})
But this approach prevents status column from being used in search.
Is sthere a way to join query with fake table? Smth like this
->join('fake_status_table', 'production_orders.status', '=', 'fake_status_table.id')
Drafting two solutions
Solution #1
$orders= DB::table('production_orders')
->select(DB::raw("DECODE (status_id, 1, 'No started',
2, 'Running',
3, 'Done',
4, 'Defect')"))
solution #2
//create tamporary table
$status_table = DB::insert( DB::raw( "CREATE TEMPORARY TABLE statuses") );
$orders = \DB::table('production_requests')
// join it with drawing table
->join('statuses', 'production_requests.status', '=', 'statuses.id')
// Generate result
$result = Datatables::of($orders)->make(true);
// KILL TEMPORARY TABLE
$dropTable = DB::unprepared( DB::raw( "DROP TEMPORARY TABLE statuses" ) );
// RETURN RESULT
return $result;
Views is nothing but a temporary table..
But it was copy of the table itself.. You shall create a view according to your need.. If you want to have the view of your entire table .. then
CREATE VIEW test.v AS SELECT * FROM t;
Or even
CREATE VIEW v AS SELECT qty, price, qty*price AS value FROM t;
Then you shall return some data from the controller and construct the coloumn as we do usual in the datatables
Like this
Jquery :
$(document).ready(function() {
$('#example').DataTable();
} );
And then foreach for the table !!
Hope this helps you
From Laravel 4 and Eloquent ORM - How to select the last 5 rows of a table, but my question is a little different.
How do I return last N records ordered in the way they were created (ASC).
So for example the following records are inserted in order:
first
second
third
fourth
fifth
I want a query to return last 2 records
fourth
fifth
Laravel Offset
DB::table('users')->skip(<NUMBER Calulation>)->take(5)->get();
You can calculate N by getting the count of the current query and skipping $query->count() - 5 to get the last 5 records or whatever you wanted.
Ex
$query = User::all();
$count = ($query->count()) - 5;
$query = $query->skip($count)->get();
In pure SQL this is done by using a subquery. Something like this:
SELECT * FROM (
SELECT * FROM foo
ORDER BY created_at DES
LIMIT 2
) as sub
ORDER BY created_at ASC
So the limiting happens in the subquery and then in the main query the order by is reversed. Laravel doesn't really have native support for subqueries. However you can still do it:
$sub = DB::table('foo')->latest()->take(2);
$result = DB::table(DB::raw('(' . $sub->toSql() . ') as sub'))
->oldest()
->get();
And if you use Eloquent:
$sub = Foo::latest()->take(2);
$result = Foo::from(DB::raw('(' . $sub->toSql() . ') as sub'))
->oldest()
->get();
Note the latest and oldest just add an orderBy('created_at) with desc and asc respectively.