I want to construct a query with a multiplication like this:
SELECT
Jobs.id AS `Jobs__id`,
(UNIX_TIMESTAMP(NOW()) - UNIX_TIMESTAMP(Jobs.date_last_done)) * Jobs.share AS `priority`
FROM jobs Jobs
ORDER BY priority DESC
Virtual fields don't seem to work in this situation, because it is impossible to use ORDER BY with virtual fields.
Any help much appreciated!
I found one possible solution, but it is bit hacky. In a custom finder model of my JobsTable I wrote this:
public function findWithPriority(Query $query, array $options)
{
$query->select([
'id',
'priority' => $query->func()->round(['(UNIX_TIMESTAMP(NOW()) - UNIX_TIMESTAMP(Jobs.date_last_done)) * Jobs.share' => 'literal']),
])
->order(['priority' => 'DESC']);
return $query;
}
I just put my multiplication in a round-function, which lets me execute literal statements. However the round-function in and of itself is just superfluous for my purposes, so I think there got to be a better solution?
Related
I am trying to make a simple query inside my model, I have already done the same thing in my controller, and so far it works.
/users/controller
$reservations = $db->fetchAll(
"SELECT TIME_FORMAT(time_start, '%H:%i') as time_start,
TIME_FORMAT(time_end, '%H:%i') as time_end
FROM bookings
WHERE datepicker = ?", [$date]);
I know that solution is not efficient, so I wanted to create a method in my function to do the same thing, however I can't find a way to enclode the time_start field with the mysql function TIME_FORMAT() using ->find() method.
update.
I have tried using virtual fields and I got only an Indirect modification of overloaded property has no effect error.
You want to use virtual fields for these. So in your case you'd want something like this:-
public $virtualFields = array(
'time_start' => "TIME_FORMAT(time_start, '%H:%i')",
'time_end' => "TIME_FORMAT(time_end, '%H:%i')"
);
These are defined within the relevant model.
It seems that Active Record (Codeigniter) doesn't accept the WEEK parameter and I don't understand why?!
Whern i remove '3', my query works properly!
$this->db->select('WEEK(insere_le,3) AS semaine, COUNT(*) AS nombre')
->from($this->table_name)
->where(array(
'type_anomalie' => "Dérogation",
'YEAR(insere_le)' => $year
))
->group_by('WEEK(insere_le,3)')
->get()
->result_array();
This query, shows the following string when I execute it:
SELECT WEEK(insere_le, `3)` AS semaine, COUNT(*) AS nombre FROM (`aero_anomalie_montage`) WHERE `type_anomalie` = 'Dérogation' AND YEAR(insere_le) = '2014' GROUP BY WEEK(insere_le, `3)`
As you can see it adds an apostrophe before the number 3 and after the parenthesis )
It looks a little confused by your syntax. Why not put them in two different selects (if that's possible...)?
I don't know if this will help, but I found this, it will prevent it from adding the backticks altogether.
$this->db->select() accepts an optional second parameter. If you set
it to FALSE, CodeIgniter will not try to protect your field or table
names with backticks. This is useful if you need a compound select
statement.
http://ellislab.com/codeigniter/user-guide/database/active_record.html
hmm, if you look at active rec class (system/core/database/DB_active_rec.php) you will find this in function select() :
if (is_string($select))
{
$select = explode(',', $select);
}
so what you're select is doing is actually exploding your string into an array like this:
array(
WEEK(insere_le,
3) AS semaine,
COUNT(*) AS nombre
);
and then processing this.
This looks like an oversight from the developers of the active record class, and probably won't be solved by not escaping the values...
On the other hand, it actually checks its a string prior to the above.. so could try this:
$this->db->select(array('WEEK(insere_le,3) AS semaine', 'COUNT(*) AS nombre'))...
and the same with group_by(array('WEEK(insere_le,3)'))...
so end result would be:
$this->db->select(array('WEEK(insere_le,3) AS semaine', 'COUNT(*) AS nombre'))
->from($this->table_name)
->where(array(
'type_anomalie' => "Dérogation",
'YEAR(insere_le)' => $year
))
->group_by(array('WEEK(insere_le,3)'))
->get()
->result_array();
you tried this?:
$this->db->select("WEEK(insere_le,3) AS semaine, COUNT(*) AS nombre", FALSE);
Mysql codeigniter query is not working properly.
Suppose if mysql table looks like this:
user_id|user_name
1|john
2|alex
3|sam
Here user_name is unique
The following query should return false if user_name=john and user_id=1 and true if say user_name=john and user_id=2.
$this->db->get_where('user', array('user_name' => $name,'user_id !=' => $userid));
But it returns true in the case user_name=john and user_id=1.
Can anyone suggest me an alternative way of querying not equal to.
print($this->db->last_query()) gives:
SELECT * FROM (user) WHERE user_name = 'john' AND user_id != '1'
Why dont you use simple $this->db->query('your query');
Simply try this, Add the desired condition in the where function.
$this -> db -> where('invitee_phone !=', $user_phone);
You can go follwoing way too. It work for me
$total = 5;
$CI = get_instance();
$CI->load->database();
$CI->db->order_by('id','asc');
$topusers = $CI->db->get_where('users',array('user_type != 1 && `status` =' => 1),$total,0);
echo $CI ->db ->last_query();
die;
and if still not work for you can go with #rohit suggest: $this->db->query('your query');
Type 1:
Using ->where("column_name !=",$columnname) is fine for one column.
But if you want to check multi columns, you have to form an array inside where clause.
Like this
$whereArray = array(
"employee_name" => $name,
"employee_id !=" => $id,
);
$this->db->select('*')->from('employee')->where($whereArray);
Type 2:
We can just write exactly what we want inside where.
Like
$thi->db->where(("employee_id =1 AND employee name != 'Gopi') OR designation_name='leader#gopis clan'");
Type 2 is good for working with combining queries, i mean paranthesis "()"
you can follow this code:
$query = $this->db->select('*')->from('employee')->where('user_name', $name)->where('user_id !=', $userid)->get();
$last_query = $this->db->last_query();
$result = $query->result_array();
if you pass $name = 'john' and $userid = '1' then it return empty array.
The problem with using $this->db->query('your query'); is that it is not portable. One of the most important reasons to embrace the query builder methods is so that no matter what database driver you use, CodeIgniter ensures that the syntax is appropriate.
If a bit of discussion was possible, I'd probably like to hear why you need composite primary identifiers in your table and I'd like to see what your table schema looks like. However, I think the time for discussion has long passed.
Effectively, you want to return a boolean result stating the availability of the combination of the username AND the id -- if one is matched, but not both, then true (available).
To achieve this, you will want to search the table for an exact matching row with both qualifying conditions, count the rows, convert that integer to a boolean, then return the opposite value (the syntax is simpler than the explanation).
Consider this clean, direct, and portable one-liner.
return !$this->db->where(['user_name' => $name,'user_id' => $userid])->count_all_results('user');
this will return false if the count is > 0 and true if the count is 0.
I have a query to select all the rows from the hire table and display them in a random order.
DB::table('hire_bikes')->order_by(\DB::raw('RAND()'))->get();
I now want to be able to put
concat(SUBSTRING_INDEX(description, " ",25), "...") AS description
into the SELECT part of the query, so that I can select * from the table and a shortened description.
I know this is possible by running a raw query, but I was hoping to be able to do this using Fluent or at least partial Fluent (like above).
How can I do it?
You can actually use select AS without using DB::raw(). Just pass in an array into the select() method like so:
$event = Events::select(['name AS title', 'description AS content'])->first();
// Or just pass multiple parameters
$event = Events::select('name AS title', 'description AS Content');
$event->title;
$event->content;
I tested it.
Also, I'd suggest against using a DB:raw() query to perform a concatenation of your description field. If you're using an eloquent model, you can use accessors and mutators to perform this for you so if you ever need a limited description, you can simply output it in your view and not have to use the same query every time to get a limited description. For example:
class Book extends Eloquent
{
public function getLimitedDescriptionAttribute()
{
return str_limit($this->attributes['description'], $limit = 100, $end = '...');
}
}
In your view:
#foreach($books as $book)
{{ $book->limited_description }}
#endforeach
Example Output (not accurate to limit):
The description of this book is...
I'd also advise against using the DB facade because it always utilizes your default connection. If you're querying a secondary connection, it won't take this into account unless you actively specify it using:
DB::connection('secondary')->table('hire_bikes')->select(['name as title'])->get();
Just to note, if you use a select AS (name AS title) and you wish to update your the model, you will still have to set the proper attribute name that coincides with your database column.
For example, this will cause an exception because the title column does not exist in your database table:
$event = Events::select('name AS title')->first();
$event->title = 'New name';
$event->save(); // Generates exception, 'title' column does not exist.
You can do this by adding a DB::raw() to a select an array in your fluent query. I tested this locally and it works fine.
DB::table('hire_bikes')
->select(
array(
'title',
'url',
'image',
DB::raw('concat(SUBSTRING_INDEX(description, " ",25),"...") AS description'),
'category'
)
)
->order_by(\DB::raw('RAND()'))
->get();
select(array(DB::raw('latitude as lat'), DB::raw('longitude as lon')))
I'm trying to use the "HAVING" clause in a SQL query using the CakePHP paginate() method.
After some searching around it looks like this can't be achieved through Cake's paginate()/find() methods.
The code I have looks something like this:
$this->paginate = array(
'fields' => $fields,
'conditions' => $conditions,
'recursive' => 1,
'limit' => 10,
'order' => $order,
'group' => 'Venue.id');
One of the $fields is an alias "distance". I want to add a query for when distance < 25 (e.g. HAVING distance < 25).
I have seen two workarounds so far, unfortunately neither suit my needs. The two I've seen are:
1) Adding the HAVING clause in the "group" option. e.g. 'group' => 'Venue.id HAVING distance < 25'. This doesn't seem to work when used in conjunction with pagination as it messes up the initial count query that is performed. (ie tries to SELECT distinct(Venue.id HAVING distance < 25) which is obviously invalid syntax.
2) Adding the HAVING clause after the WHERE condition (e.g. WHERE 1 = 1 HAVING field > 25) This doesn't work as it seems the HAVING clause must come after the group statement which Cake is placing after the WHERE condition in the query it generates.
Does anyone know of a way to do this with CakePHP's find() method? I don't want to use query() as that would involve a lot of rework and also mean I'd need to implement my own pagination logic!
Thanks in advance
You have to put it with the group conditions. like this
$this->find('all', array(
'conditions' => array(
'Post.length >=' => 100
),
'fields' => array(
'Author.id', 'COUNT(*) as Total'
),
'group' => array(
'Total HAVING Total > 10'
)
));
Hope it helps you
I used the following trick to add my own HAVING clause at the end of my WHERE clause. The "dbo->expression()" method is mentioned in the cake sub-query documentation.
function addHaving(array $existingConditions, $havingClause) {
$model = 'User';
$db = $this->$model->getDataSource();
// Two fun things at play here,
// 1 - mysql doesn't allow you to use aliases in WHERE clause
// 2 - Cake doesn't allow a HAVING clause separate from a GROUP BY
// This expression should go last in the WHERE clause (following the last AND)
$taut = count($existingConditions) > 0 ? '1 = 1' : '';
$having = $db->expression("$taut HAVING $havingClause");
$existingConditions[] = $having;
return $existingConditions;
}
As per the manual, CakePHP/2 supports having at last. It was added as find array parameter on version 2.10.0, released on 22nd July 2017.
From the 2.10 Migration Guide:
Model::find() now supports having and lock options that enable you to
add HAVING and FOR UPDATE locking clauses to your find operations.
Just had the same problem. I know, one is not supposed to modify the internal code but if you open the PaginatorComponent and you modify line 188:
$count = $object->find('count', array_merge($parameters, $extra));
to this:
$count = $object->find(
'count',
array_merge(array("fields" => $fields),$parameters, $extra)
);
Everything will be fixed. You will be able to add your HAVING clause to the 'group' and the COUNT(*) won't be a problem.
Or, make line:
$count = $object->paginateCount($conditions, $recursive, $extra);
to include the $fields:
$count = $object->paginateCount($fields,$conditions, $recursive, $extra);
After that, you can "override" the method on the Model and make sure to include the $fields in the find() and that's it!, =P
Here is another idea that doesn't solve the pagination issue, but it is clean since it just overrides the find command in AppModel. Just add a group and having element to your query and this will convert to a HAVING clause.
public function find($type = 'first', $query = array()) {
if (!empty($query['having']) && is_array($query['having']) && !empty($query['group'])) {
if ($type == 'all') {
if (!is_array($query['group'])) {
$query['group'] = array($query['group']);
}
$ds = $this->getDataSource();
$having = $ds->conditions($query['having'], true, false);
$query['group'][count($query['group']) - 1] .= " HAVING $having";
CakeLog::write('debug', 'Model->find: out query=' . print_r($query, true));
} else {
unset($query['having']);
}
}
return parent::find($type, $query);
}
Found it here
https://groups.google.com/forum/?fromgroups=#!topic/tickets-cakephp/EYFxihwb55I
Using 'having' in find did not work for me. Instead I put into one string with the group
" group => product_id, color_id having sum(quantity) > 2000 " and works like a charm.
Using CakePHP 2.9