I build a function
public function getBannedByLogin($commentId)
{
$sql = $this->getDbAdapter()->select()
->from(array('comments' => 'comments'), array())
->join(array('users' => 'qengine_users'),
'comments.bannedBy = users.userId',
array())
->where('commentId = ?', $commentId)
;
$row = $this->fetchRow($sql);
return $row['login'];
}
And there are problems, that does'nt work! :D
Let's I explain you. Column 'bannedBy' from comments returns id of user, who give a ban. I need to join this with table users to load a login field. Where i have mistakes?
I assume the code works in the sense of not throwing an exception. If so, your code is OK, you just specifically tell Zend_Db not to select any columns.
public function getBannedByLogin($commentId)
{
$sql = $this->getDbAdapter()->select()
->from(array('comments' => 'comments'))
->join(array('users' => 'qengine_users'),
'comments.bannedBy = users.userId')
->where('commentId = ?', $commentId)
;
$row = $this->fetchRow($sql);
return $row['login'];
}
The last argument to from() and join() functions is an array of columns you wish to select. If you pass in an empty array, no columns are selected. No argument = select everything. You can, of course, specify only the columns you need too.
Related
I'm still new to this laravel, for now I'm facing a trouble for fetching data from the database. What i want to get is when there are only one data available, the second parameters won't be executed, but if there are some data available on the second parameters, then all the data from first parameter and the second parameter will be called.
$detail = Barang_Keluar_Detail::findOrFail($id); //15
$cariid = $detail->pluck('barang_keluar_id');
$instansiquery = Barang_Keluar::where('id',$cariid)->first(); //21
$instansiid = $instansiquery->pluck('instansi_id');
$tanggal = $instansiquery->pluck('tanggal')->first();//2019-12-31
and the parameter are here
$cariinstasama = Barang_Keluar::where('id', $cariid)
->orWhere(function ($query) use($instansiid, $tanggal) {
$query->where('tanggal', "'$tanggal'")
->where('instansi_id', $instansiid);
});
Please any help will be appreciated, thank you.
Laravel query builder provides elegant way to put conditional clause using when() . You can put conditional clause on your query like this:
$cariinstasama = Barang_Keluar::where('id', $cariid)
->when($instansiid, function ($query, $instansiid) {
return $query->where('instansi_id', $instansiid);
})
->when($tanggal, function ($query, $tanggal) {
return $query->where('tanggal', $tanggal);
})->get();
For more info see https://laravel.com/docs/5.8/queries#conditional-clauses
You can try this as well.
$cariinstasama = Barang_Keluar::where('id', $cariid);
if($instansiid !== null)
{
$cariinstasama->where('instansi_id', $instansiid);
}
if($tanggal !== null)
{
$cariinstasama->where('instansi_id', $instansiid);
}
$result = $cariinstasama->get();
Its not clear what exactly you want.
Are you applying more than one parameter on the query if the first parameter result gives you more than one row in the database? If yes check out my approach :
$query = new Model(); // the model you want to query
if($query->where('col1', $param1)->count() > 1) // checks if the query from the 1st parameter produces more than one row in the database
$query = $query->where( // if yes apply more parameters to the query
[
['col1', $param1],
['col2', $param2]
]
);
else
$query = $query->where('col1', $param1);
$results = $query->get();
Hope it helps....
I have some code below which demonstrates a hard-coded example of what I would like to accomplish dynamically.
At a high level, I wish to do something like select * from view_data_$app_state and then get all of the data from that views table into my mustache templates dynamically.
The code I currently must use to group multiple rows of data for a specific column along with the views data is:
<?php
error_reporting(E_ALL);
class Example {
function __construct(){
try {
$this->db = new PDO('mysql:host=localhost;dbname=Example', 'root','drowssap');
}
catch (PDOException $e) {
print($e->getMessage());
die();
}
}
function __destruct(){
$this->db = null;
}
function string_to_array($links_string){
return explode(",", $links_string);
}
function get_view_data(){
$q = $this->db->prepare('select *, GROUP_CONCAT(`links`) as "links" from `view_data_global` ');
$q->execute();
$result = $q->fetchAll(PDO::FETCH_ASSOC);
return $result;
}
}
$Example = new Example();
$result = $Example->get_view_data();
$result[0]["links"] = $Example->string_to_array($result[0]["links"]);
echo json_encode($result);
This gives me the perfect object while
GROUP_CONCAT seems to be doing the trick this way, however I MUST know the column name that will contain multiple rows before writing the query. I am trying to figure out an approach for this and wish to make a custom query + code example that will transform cols with multiple rows of null null and not empty data into an array like above - but return the data.. again like the code above.
Below is an output of the actual data:
[{"id":"1","title":"This is the title test","links":["main","about","store"]}];
How can I replicate this process dynamically on each view table?
Thank you so much SO!
You can use PDOStatement::fetch to retrieve your results, with fetch_style set to PDO::FETCH_ASSOC (some other values will also provide the same information). In this case, the result set will be array indexed by column name. You can access this information with foreach (array_expression as $key => $value)
See the documentation for additional information.
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 two tables for storing information about a user. One is for authentication, the other is information the user will enter themselves. I am writing a model that will be used when the user interacts with this information. The following method is to return data for display and modification.
I need a query that will return 'email' and 'username' from $accounts_table and * from $profiles_table. I can't seem to get my head around the JOIN syntax though. I understand how joins work, but my queries throw sentax errors.
function get_userdata($id){
$data = array();
$this->db->get_where($this->profiles_table, array('user_id' => $id));
$this->db->join($this->accounts_table.'.email', $this->accounts_table.'.id = '.$this->profiles_table.'.user_id');
$data= $this->db->get();
return $data;
}
I see a couple of issues:
You should be using $this->db->where(), instead of $this->db->get_where(). get_where() executes the query immediately.
$this->db->get_where('user_id', $id);
Also the first argument of $this->db->join() should only be the table name, excluding the field.
$this->db->join($this->accounts_table, $this->accounts_table.'.id = '.$this->profiles_table.'.user_id');
And you're returning $data which is just an empty array(). You would need to pass the query results to $data like this:
$data = $record->result_array();
get_where executes the query. So, your join is its own query, which doesn't work.
You need to break get_where into where and from.
Also, in MySQL, you JOIN a table, not a field. If you want that field, add it to the SELECT.
$this->db->select($this->profiles_table.'.*');
$this->db->select($this->accounts_table.'.email,'.$this->accounts_table.'.username');
$this->db->from($this->profiles_table);
$this->db->where('user_id', $id);
$this->db->join($this->accounts_table, $this->accounts_table.'.id = '.$this->profiles_table.'.user_id');
$data = $this->db->get();
NOTE: $this->db->get() returns a query object, you need to use result or row to get the data.
I think you've a mistake:
$this->db->join($this->accounts_table.'.email', $this->accounts_table.'.id = '.$this->profiles_table.'.user_id');
First parameter should a table NOT a field: $this->accounts_table.'.email' is wrong IMHO. Or only a typo :)
I'm trying to retrieve content using two items in the URL. Here is the php/symfony code that should do it:
$em = $this->getDoctrine()->getEntityManager();
$repository = $this->getDoctrine()
->getRepository('ShoutMainBundle:Content');
$query = $repository->createQueryBuilder('p')
->where('p.slug > :slug')
->andWhere('p.subtocontentid > :parent')
->setParameters(array(
'slug' => $slug,
'parent' => $page
))
->getQuery();
$content = $query->getSingleResult();
However, when this code is executed it returns the following error:
No result was found for query although at least one row was expected.
I have done some tests, and the data held in the $slug and $page variables hold the correct information. I have also tested the MySQL query and the query brings up the desired result, which confuses me further.
Have I missed something?
As it was answered here
You are getting this error because you are using the
getSingleResult() method. it generates an Exception if it can't find
even a single result. you can use the getOneOrNullResult() instead
to get a NULL if there isn't any result from the query.
Query#getSingleResult(): Retrieves a single object. If the result
contains more than one object, an NonUniqueResultException is thrown.
If the result contains no objects, an NoResultException is thrown. The
pure/mixed distinction does not apply.
No result was found for query although at least one row was expected.
Another reason could be:
You did this
$query = $this->getEntityManager()
->createQuery('
SELECT u FROM MyBundle:User u
WHERE u.email = :email')
->setParameter('email', $email);
return $query->getSingleResult();
Instead of this
$query = $this->getEntityManager()
->createQuery('
SELECT u FROM MyBundle:User u
WHERE u.email = :email')
->setParameter('email', $email);
$query->setMaxResults(1);
return $query->getResult();
Don't you want to use "=" instead of ">" ?
If you've got this message because used
$content = $query->getSingleResult();
you can just replace it with the row below
$content = $query->getOneOrNullResult(AbstractQuery::HYDRATE_SINGLE_SCALAR) ?? 0;