use joins in zend framework query - zend-framework

Question

I want to use joins in zend. Below is my query
$select = $this->_db->select()
->from(array('evaluationcriteria' => 'procurement_tbltenderevaluationcriteria'),
array('ScoringCriteriaID','ScoringCriteriaWeight'))
->join(array('scoringcriteria' => 'procurement_tbltenderscoringcriteria'),
'scoringcriteria. TenderId=evaluationcriteria.TenderId')
->join(array('tenderapplications' => 'procurement_tbltenderapplications','tendersupplier' => 'tblsupplier'),
'tenderapplications. TenderInvitationContractorID=tendersupplier.UserID');
I have UserID in tendersupplier table. but its giving following error :-
Column not found: 1054 Unknown column 'tendersupplier.UserID' in 'on clause

Answer 1

I think its not the right way to include more than one tale in same array of a join.
Try code like this..
->from(array('evaluationcriteria' => 'procurement_tbltenderevaluationcriteria'),
array('ScoringCriteriaID','ScoringCriteriaWeight'))
->join(array('scoringcriteria' => 'procurement_tbltenderscoringcriteria'),
'scoringcriteria. TenderId=evaluationcriteria.TenderId')
'scoringcriteria. TenderId=evaluationcriteria.TenderId')
->join(array('tenderapplications' => 'procurement_tbltenderapplications'),
'tenderapplications.TenderInvitationContractorID=tblsupplier.UserID');
I am not sure whether you are planning to join values from tblsupplier table also.

Answer 2

The where condition is not written the way you did .
I dount that tblsupplier is a table then it should be in an array
This code is not tested!
$select = $this->_db->select()
->from(array('evaluationcriteria' => 'procurement_tbltenderevaluationcriteria'),
array('ScoringCriteriaID','ScoringCriteriaWeight'))
->join(array('scoringcriteria' => 'procurement_tbltenderscoringcriteria'),
'scoringcriteria. TenderId=evaluationcriteria.TenderId')
->join(array('tenderapplications' => 'procurement_tbltenderapplications'), array('tendersupplier' => 'tblsupplier'))
->where('tenderapplications. TenderInvitationContractorID=tendersupplier.UserID');

Answer 3

Looks like you are trying to join 2 tables in one ->join, I don't think you can do that.
join code from Zend_Db_Select()
/**
* Adds a JOIN table and columns to the query.
*
* The $name and $cols parameters follow the same logic
* as described in the from() method.
*
* #param array|string|Zend_Db_Expr $name The table name.
* #param string $cond Join on this condition.
* #param array|string $cols The columns to select from the joined table.
* #param string $schema The database name to specify, if any.
* #return Zend_Db_Select This Zend_Db_Select object.
*/
public function join($name, $cond, $cols = self::SQL_WILDCARD, $schema = null)
{
return $this->joinInner($name, $cond, $cols, $schema);
}
Here is the comment block from from()
/**
* Adds a FROM table and optional columns to the query.
*
* The first parameter $name can be a simple string, in which case the
* correlation name is generated automatically. If you want to specify
* the correlation name, the first parameter must be an associative
* array in which the key is the correlation name, and the value is
* the physical table name. For example, array('alias' => 'table').
* The correlation name is prepended to all columns fetched for this
* table.
*
* The second parameter can be a single string or Zend_Db_Expr object,
* or else an array of strings or Zend_Db_Expr objects.
*
* The first parameter can be null or an empty string, in which case
* no correlation name is generated or prepended to the columns named
* in the second parameter.
*
* #param array|string|Zend_Db_Expr $name The table name or an associative array
* relating correlation name to table name.
* #param array|string|Zend_Db_Expr $cols The columns to select from this table.
* #param string $schema The schema name to specify, if any.
* #return Zend_Db_Select This Zend_Db_Select object.
*/
Maybe try something like this instead:
$select = $this->_db->select()
//FROM table procurement_tbltenderevaluationcriteria AS evaluationcriteria, SELECT FROM
//COLUMNS ScoringCriteriaID and ScoringCriteriaWeight
->from(array('evaluationcriteria' => 'procurement_tbltenderevaluationcriteria'),
array('ScoringCriteriaID','ScoringCriteriaWeight'))
//JOIN TABLE procurement_tbltenderscoringcriteria AS scoringcriteria WHERE
//TenderId FROM TABLE scoringcriteria == TenderId FROM TABLE evaluationcriteria
->join(array('scoringcriteria' => 'procurement_tbltenderscoringcriteria'),
'scoringcriteria.TenderId=evaluationcriteria.TenderId')
//JOIN TABLE procurement_tbltenderapplications AS tenderapplications
->join(array('tenderapplications' => 'procurement_tbltenderapplications'))
//JOIN TABLE tblsupplier AS tendersupplier WHERE TenderInvitationContractorID FROM TABLE
// tenderapplications == UserID FROM TABLE tendersupplier
->join(array('tendersupplier' => 'tblsupplier'),
'tenderapplications.TenderInvitationContractorID=tendersupplier.UserID');
you may also need to alter your select() definition to allow joins:
//this will lock the tables to prevent data corruption
$this->_db->select(Zend_Db_Table::SELECT_WITHOUT_FROM_PART)->setIntegrityCheck(FALSE);
I hope I'm reading your intent correctly, this should get you closer if not all the way there. (one hint, use shorter aliases...)