I am trying to retrieve the latest entered if from the 'order' table within my database.
I'm currently trying to use the following method:
public function getLatestOrderId()
{
$adapter = $this->adapter;
$sql = new Sql($adapter);
$select = $sql->select();
$select->columns(array('id' => 'orderId'));
$select->from('order');
$select->order('orderId DESC');
$select->limit(1);
$statement = $sql->prepareStatementForSqlObject($select);
$statement->execute();
}
I have a feeling that this should be working. I am then accessing this method in the controller like so:
$orderId = $this->getOrderTable()->getLatestOrderId();
I have realised that at present the getLatestOrderId method does not actually return anything e.g. return $statement->execute();. This is because I receive an error saying that the sql result could not be converted to a string.
I'm insure what is going wrong, so any help would be much appreciated.
Thank you.
Related
I am having issues trying to query an Eloquent relationship.
I have 2 tables
tbl_deals
id
deal_id
merchant_id
tbl_merchants
id
merchant_id
merchant_url_text
I defined a deal model as
class deal extends Model
{
public function merchant() {
return $this->hasOne('App\merchant', 'merchant_id', 'merchant_id');
}
}
Now, I want to query all deals based where merchant_url_text = a variable in my controller
Here's what I am trying
$deals = deal::with('merchant')->get(); //Retrieving all the deals with merchants
If I return $deals its giving me all deals with merchant relationship.
How do I constraint the deals by saying where merchant_url_text = $variable
I am trying
return $deals->where('merchant_url_text', $merchant_url_text)->get();
but it is giving me an error saying :
"Missing argument 1 for Illuminate\Support\Collection::get(), called in ..."
I tried to lookup the documentation for querying relationships in Laravel Docs. It talks about this example
$user = App\User::find(1);
$user->posts()->where('active', 1)->get();
In this case, its trying to get the first user and finding corresponding posts related to the user.
In my case I want to filter from all deals, the deals that have merchant_url_text = a specific variable in my controller.
Any help on how I can achieve this?
Thanks
Try the following code :
$specific_merchant_url_text = "i don't know";
$deals_with_specific_merchant_url_text = [];
$deals = deal::with('merchant')->get();
foreach($deals as $deal)
if( $deal->merchant->merchant_url_text==$specific_merchant_url_text)
array_push($deals_with_specific_merchant_url_text, $deal);
So you get array of deals with specific merchant url text in deals_with_specific_merchant_url_text.
Another approach using DB object :
$deals = DB::table('deals')
->join('merchants', 'deals.merchant_id', '=', 'merchants.id')
->select('deals.*')
->where('merchants.merchant_url_text', $merchant_url_text)
->get();
Yours with raw :
$deals = deal::selectRaw('tbl_deals.*')
->Join('merchants','deals.merchant_id','=','merchants.merchant_id')
->where('merchants.merchant_url_text', '=', $merchant_url_text) ->get();
Hope this helps.
With takes a callback. This will bring back all deals but only eager load merchants that match.
$deals = Deal::with(['merchant' => function ($query) use ($url_text){
return $query->where('merchant_url_text', $url_text);
}])->get();
Flip-side: if you only want deals with a matching merchant, use where has.
$deals = Deal::whereHas('merchant', function ($query) use ($url_text){
return $query->where('merchant_url_text', $url_text);
})->get();
If you want both, chain them:
$deals = Deal::whereHas('merchant', function ($query) use ($url_text){
return $query->where('merchant_url_text', $url_text);
})->with(['merchant' => function ($query) use ($url_text){
return $query->where('merchant_url_text', $url_text);
}])->get();
I capitalized deal because it's standard. It wasn't capitalized in your example.
You can use query builder join query .
DB::table('tbl_merchants')
->join('tbl_deals', 'tbl_merchants.merchant_id', '=','tbl_deals.merchant_id')
->where('tbl_merchants.merchant_url_text',$merchant_url_text)
->get();
I want to change a row field in my ResultSet before returning it to my Controller.
$resultSet->buffer();
foreach ($resultSet as $row) {
$row->foo = $newvalue;
}
return $resultSet;
Problem is, when I use the buffer() function I can indeed loop over my ResultSet and make some changes on my rows, but once the loop ends all changes are gone.
I tried to set up a reference on $row :
foreach ($resultSet as &$row)
But then caught the following exception :
Fatal error: An iterator cannot be used with foreach by reference
I also tried to change resultSet to array but the same problem occurs.
Have I missed something ?
I don't think it is possible via the usual ResultSet usage. The array solution might work only if you are going to use the array in loops (foreach() in this case).
From any Table class -
$arr_resultSet = array();
foreach ($resultSet as $row) {
$row->foo = $newvalue;
//Object is assigned instead of converting it to an array.
$arr_resultSet[] = $row;
}
return $arr_resultSet;
Usage of this array in controller or view file -
//Here you can access that $row object as if the $resultSet was never converted to array.
foreach($arr_resultSet as $row) {
echo $row->foo;
}
No need of buffer(). I hope it works for now. Will definitely search for a proper solution.
How to use having() clause in ZF2?
There is almost no examples on the web how to prepare correct select object with having.
I have query like:
SELECT root_schema_id as `schema_id`
FROM `standard_specific_root_schemas`
WHERE `vehicle_id` IN (".implode(",",$vehiclesIds).")
GROUP BY `schema_id`, rootSubGroup_id HAVING count(*)=".$noOfVehicles
And I'm trying to run it in ZF2:
public function getVehicleWithinCommonRootSubgroupInSpecific($vehiclesIds)
{
$where = new Where();
$where->in('vehicle_id', $vehiclesIds);
$having = new Having('count(*) = '.count($vehiclesIds));
$rowset = $this->tableGateway->select(function (Select $select) use ($where, $having) {
$select
->where($where)
->having($having);
});
if (!$rowset) {
throw new \Exception("Could not find schemas for group $groupId");
}
return $rowset;
}
Of course that part in ZF2 is not finished yet as I wanted to check if it's working first.
I've tried few ways of providing params to having method but everything generates errors.
Help please, I'm desperate...
I cannot test your query, but can try and reproduce the query you need.
I adjusted the having to use ->expression() instead of a variable via the construct.
I also added the group statement.
To view the query I added a var_dump:
$where = new \Zend\Db\Sql\Where();
$where->in('vehicle_id', $vehiclesIds);
$having = new \Zend\Db\Sql\Having();
$having->expression('count(*) = ?', count($vehiclesIds));
$rowset = $this->tableGateway->select(function (\Zend\Db\Sql\Select $select) use ($where, $having) {
$select
->where($where)
->group(array('schema_id', 'rootSubGroup_id'))
->having($having);
var_dump( $select->getSqlString() );
});
Let me know if this helps.
To circumvent the error mentioned in the comments you would have to do something like below:
$sql = $this->tableGateway->getSql();
$select = $sql->select();
$where = new \Zend\Db\Sql\Where();
$where->in('vehicle_id', $vehiclesIds);
$having = new \Zend\Db\Sql\Having();
$having->expression('count(*) = ?', count($vehiclesIds));
$select
->where($where)
->group(array('schema_id', 'rootSubGroup_id'))
->having($having);
$preparedQuery = $sql->prepareStatementForSqlObject($select);
var_dump( $preparedQuery->getSql() );
However, if I'm right, the tableGateway does this for you so the error should go away once you start using the select to query the database.
Also, you can use the above to do that too, just replace this:
$preparedQuery = $sql->prepareStatementForSqlObject($select);
var_dump( $preparedQuery->getSql() );
With:
$this->tableGateway->selectWith($select);
I have the following statements but they return an empty result set:
$sql = 'SELECT * FROM `industry` WHERE `code` LIKE ?';
$statement = $this->getAdapter()->createStatement($sql, array('A_'));
$statement->execute();
What am I doing wrong? I really don't want to use the Zend\Db\Sql\Sql, as it is very verbose.
On a related point, where can I go to find out more about the theory of operation for Zend\Db? It's absolutely maddening. Why does it sometimes return a driver result? Sometimes a ResultSet? How can you view the complete SQL (after quoting, but before execution?) Etc...
OK, I had missed the fact that a Result is iterable (as well as a ResultSet). Therefore, assigning the result of $statement->execute() to a variable, then iterating that variable, sorted out the problem.
Futhermore, you can call getResource() on the result object, and from there access the underlying object (in this case, a PDO Statement). This means you can do things like result->getResource()->fetchAll();
Try with this query.
use Zend\Db\TableGateway\TableGateway;
use Zend\Db\Sql\Sql;
class tableNameTable
{
protected $tableGateway;
public function __construct(TableGateway $tableGateway)
{
$this->tableGateway = $tableGateway;
}
Publice function getIndustry(){
$adapter = $this->tableGateway->getAdapter();
$statement = $adapter->query("Your Query");
$results = $statement->execute();
return $results;
}
}
I feel like I must me missing something very simple. It's a very simple task, all I want to do is get something like:
SELECT * FROM lookup_items
JOIN lookup ON lookup_items.lookup_id = lookup.id
This returns all the columns for all the joined tables, in regular SQL. Here's my attempt in zf2:
$select = new Select();
$select->from('lookup_items');
$select->join('lookup', 'lookup_items.lookup_id = lookup.id');
The result set only includes the columns in 'lookup_items'. I've tried various ways to get the 'lookup' columns, including:
$select->columns(array('lookup_items.*', 'lookup.*'));
But they all just blow up. Surely there's a way to do this, and it's just so simple I'm missing it completely.
I thought a simple example would be avoid confusion, but here's more code:
class LookupItemsTable extends AbstractTableGateway
{
public function getList($resource)
{
$system_name = str_replace('*', '%', strtoupper($resource));
$joinTable = 'lookup';
$select = new Select();
$select->from($this->table);
$select->join($joinTable, "{$this->table}.lookup_id = {$joinTable}.id");
$where = array();
$where[] = "{$this->table}.enabled is true";
$where[] = "{$joinTable}.enabled is true";
$where[] = "UPPER({$joinTable}.system_name) ilike '{$system_name}'";
$select->where($where);
$sort[] = 'sort_order ASC';
$sort[] = 'value ASC';
$select->order($sort);
$rowset = $this->selectWith($select);
return $rowset;
}
}
Where:
$resource = $this->params()->fromRoute('resource', 'BUSINESS');
And $this->table is 'lookup_items'. Really all I want to do is get columns from both joined tables. I guess there's a zf2 way to just make a straight SQL statement without all the OO falderal, so I could just force it that way. But I'd rather work within the framework as much as possible.
Just change this line
$select->join('lookup', 'lookup_items.lookup_id = lookup.id');
to
$select->join('lookup', 'lookup_items.lookup_id = lookup.id', array('lookupcol1', 'lookupcol2');
Raj answer is the best one but it only works if you don't forget to add these fiels in your LookupItems model.
class LookupItems
{
// Your lookup_items fields here...
...
// And the added lookup fields here, the ones you add in the array
public $lookupcol1;
public $lookupcol2;
And in the exchangeArray method :
public function exchangeArray($data)
{
// .... your fields, and the new ones
$this->lookupcol1 = (! empty($data['lookupcol1'])) ? $data['lookupcol1'] : null;
$this->lookupcol2 = (! empty($data['lookupcol2'])) ? $data['lookupcol2'] : null;
}
I figured it out.
Added this:
$select->columns(array('*'));
And then this near the end:
$sql = new Sql($this->adapter);
$statement = $sql->prepareStatementForSqlObject($select);
$rowset = $statement->execute();
This returns the expected result, with the caveat that now my rows are returned as associative arrays instead of objects.
This is how you can create queries with join in zf2.
$resultSet = $this->select(function (Select $select) {
// omit the table name
//$select->from('foo');
$select->join('users', "users.id foo.createdby", 'firstname', '');
$select->order('id ASC');
// echo $select->getSqlString();// to print your query
});
$entities = array();
foreach ($resultSet as $row) {
$entity = new Entity\Foo();
$entity->setId($row->id)
->setFullname($row->fullname)
->setCaseid($row->caseid)
->setTestimonial($row->testimonial)
->setSortorder($row->sortorder)
->setActive($row->active)
->setCreated($row->created)
->setModified($row->modified)
->setFirstname($row->firstname)
->setCreatedby($row->createdby);
$entities[] = $entity;
}
return $entities;