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Refactored query construction

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This commit is contained in:
Timothy Warren 2012-03-14 10:52:11 -04:00
parent 3f7236c706
commit b550cacdd6
4 changed files with 213 additions and 105 deletions
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265
sys/db/query_builder.php
View File

@ -15,15 +15,12 @@
/**
* Convienience class for creating sql queries - also the class that
* instantiates the specific db driver
*
* @todo Implement query queue to better match user meaning on queries
*/
class Query_Builder {
// Compiled query component strings
private $select_string,
$from_string,
$where_string,
$insert_string,
$update_string,
$set_string,
@ -31,13 +28,14 @@ class Query_Builder {
$group_string;
// Key value pairs
private $where_array,
$like_array,
$set_array,
private $set_array,
$set_array_keys,
$order_array,
$group_array;
// Values to apply to prepared statements
private $values;
// Query-global components
private $limit,
$offset;
@ -46,6 +44,15 @@ class Query_Builder {
private $sql;
// Query component order mapping
// for complex select queries
//
// Format:
//
// array(
// 'type' => 'where',
// 'conjunction' => ' AND ',
// 'string' => 'k=?'
// )
private $query_map;
/**
@ -167,36 +174,35 @@ class Query_Builder {
*/
public function like($field, $val, $pos='both')
{
// @todo Fix like syntax
$field = $this->db->quote_ident($field);
$this->like_array[$field] = array(
'value' => $val,
'pos' => $post
);
// Add the like string into the order map
$l = $field. ' LIKE ';
$l = $field. ' LIKE ?';
if ($pos == 'before')
{
$l .= '%?';
$val = "%{$val}";
}
elseif ($pos == 'after')
{
$l .= '?%';
$val = "{$val}%";
}
else
{
$l .= '%?%';
$val = "%{$val}%";
}
$this->query_map[] = array(
'type' => 'like',
'conjunction' => (empty($this->query_map)) ? 'WHERE ' : ' AND ',
'string' => $l,
'value' => $val
'string' => $l
);
// Add to the values array
$this->values[] = $val;
return $this;
}
@ -213,28 +219,26 @@ class Query_Builder {
*/
public function where($key, $val=array())
{
$where = array();
// Key and value passed? Add them to the where array
if (is_scalar($key) && is_scalar($val))
{
$this->where_array[$key] = $val;
$where[$key] = $val;
$this->values[] = $val;
}
// Array or object, loop through and add to the where array
elseif ( ! is_scalar($key))
{
foreach($key as $k => $v)
{
$this->where_array[$k] = $v;
$where[$k] = $v;
$this->values[] = $v;
}
}
// The values are irrelevant until the query is actually run
$fields = array_keys($this->where_array);
// Array of conditions
$kv_array = array();
// Create key/value placeholders
foreach($fields as $f)
foreach($where as $f => $val)
{
// Split each key by spaces, incase there
// is an operator such as >, <, !=, etc.
@ -243,20 +247,21 @@ class Query_Builder {
// Simple key = val
if (count($f_array) === 1)
{
$kv_array[] = $this->db->quote_ident($f_array[0]) . '= ?';
$item = $this->db->quote_ident($f_array[0]) . '= ?';
}
else // Other operators
{
$kv_array[] = $this->db->quote_ident($f_array[0]) . " {$f_array[1]} ?";
$item = $this->db->quote_ident($f_array[0]) . " {$f_array[1]} ?";
}
// Put in the query map for select statements
$this->query_map[] = array(
'type' => 'where',
'conjunction' => ( ! empty($this->query_map)) ? ' AND ' : ' WHERE ',
'string' => $item
);
}
// Create the where portion of the string
$this->where_string = ' WHERE '.implode(' AND ', $kv_array);
unset($kv_array);
unset($fields);
return $this;
}
@ -271,7 +276,49 @@ class Query_Builder {
*/
public function or_where($field, $val=array())
{
// @todo Implement or_where method
$where = array();
// Key and value passed? Add them to the where array
if (is_scalar($field) && is_scalar($val))
{
$where[$field] = $val;
$this->values[] = $val;
}
// Array or object, loop through and add to the where array
elseif ( ! is_scalar($field))
{
foreach($key as $k => $v)
{
$where[$k] = $v;
$this->values[] = $v;
}
}
// Create key/value placeholders
foreach($where as $f => $val)
{
// Split each key by spaces, incase there
// is an operator such as >, <, !=, etc.
$f_array = explode(' ', trim($f));
// Simple key = val
if (count($f_array) === 1)
{
$item = $this->db->quote_ident($f_array[0]) . '= ?';
}
else // Other operators
{
$item = $this->db->quote_ident($f_array[0]) . " {$f_array[1]} ?";
}
// Put in the query map for select statements
$this->query_map[] = array(
'type' => 'where',
'conjunction' => ( ! empty($this->query_map)) ? ' OR ' : ' WHERE ',
'string' => $item
);
}
return $this;
}
@ -445,7 +492,7 @@ class Query_Builder {
// Set the table
if ( ! empty($table))
{
$this->from_string = $this->db->quote_ident($table);
$this->from($table);
}
// Set the limit, if it exists
@ -454,12 +501,12 @@ class Query_Builder {
$this->limit($limit, $offset);
}
$sql = $this->_compile('select');
$sql = $this->_compile_select();
// Do prepared statements for anything involving a "where" clause
if ( ! empty($this->where_string))
if ( ! empty($this->query_map))
{
$result = $this->db->prepare_execute($sql, array_values($this->where_array));
$result = $this->db->prepare_execute($sql, $this->values);
}
else
{
@ -490,6 +537,7 @@ class Query_Builder {
if (is_scalar($key) && is_scalar($val))
{
$this->set_array[$key] = $val;
$this->values[] = $val;
}
// Object or array
elseif ( ! is_scalar($key))
@ -497,6 +545,7 @@ class Query_Builder {
foreach($key as $k => $v)
{
$this->set_array[$k] = $v;
$this->values[] = $val;
}
}
@ -528,11 +577,13 @@ class Query_Builder {
$this->set($data);
}
$params = array_values($this->set_array);
$sql = $this->_compile("insert", $table);
return $this->db->prepare_execute($sql, $params);
$res = $this->db->prepare_execute($sql, $this->values);
$this->_reset();
return $res;
}
// --------------------------------------------------------------------------
@ -554,24 +605,12 @@ class Query_Builder {
$sql = $this->_compile('update', $table);
$params = array_values($this->set_array);
$res = $this->db->prepare_execute($sql, $this->values);
// Do a linear array merge if there is a where string.
// We need all the parameters to line up, even when
// there are placeholders in the where string and
// the set string
if ( ! empty($this->where_string))
{
$where_params = array_values($this->where_array);
foreach($where_params as $w)
{
$params[] = $w;
}
}
$this->_reset();
// Run the query
return $this->db->prepare_execute($sql, $params);
return $res;
}
// --------------------------------------------------------------------------
@ -593,10 +632,13 @@ class Query_Builder {
// Create the SQL and parameters
$sql = $this->_compile("delete", $table);
$params = array_values($this->where_array);
// Delete the table, and return the result
return $this->db->prepare_execute($sql, $params);
$res = $this->db->prepare_execute($sql, $this->values);
$this->_reset();
// Delete the table rows, and return the result
return $res;
}
// --------------------------------------------------------------------------
@ -641,46 +683,13 @@ class Query_Builder {
* @param string $table
* @return $string
*/
private function _compile($type="select", $table="")
private function _compile($type, $table="")
{
$sql = '';
switch($type)
{
default:
case "select":
$sql = 'SELECT * FROM '.$this->from_string;
// Set the select string
if ( ! empty($this->select_string))
{
// Replace the star with the selected fields
$sql = str_replace('*', $this->select_string, $sql);
}
// Set the where string
if ( ! empty($this->where_string))
{
$sql .= $this->where_string;
}
// Set the group_by string
if ( ! empty($this->group_string))
{
$sql .= $this->group_string;
}
// Set the order_by string
if ( ! empty($this->order_string))
{
$sql .= $this->order_string;
}
// Set the limit via the class variables
if (isset($this->limit) && is_numeric($this->limit))
{
$sql = $this->sql->limit($sql, $this->limit, $this->offset);
}
break;
case "insert":
@ -694,24 +703,82 @@ class Query_Builder {
case "update":
$sql = 'UPDATE '.$this->db->quote_ident($table). ' SET '. $this->set_string;
if ( ! empty($this->where_string))
// Set the where string
if ( ! empty($this->query_map))
{
$sql .= $this->where_string;
foreach($this->query_map as $q)
{
$sql .= $q['conjunction'] . $q['string'];
}
}
break;
case "delete":
$sql = 'DELETE FROM '.$this->db->quote_ident($table);
if ( ! empty($this->where_string))
// Set the where string
if ( ! empty($this->query_map))
{
$sql .= $this->where_string;
foreach($this->query_map as $q)
{
$sql .= $q['conjunction'] . $q['string'];
}
}
break;
}
//echo $sql.'<br />';
// echo $sql.'<br />';
return $sql;
}
// --------------------------------------------------------------------------
/**
* Compiles a "select" type query
*
* @return string
*/
private function _compile_select()
{
$sql = 'SELECT * FROM '.$this->from_string;
// Set the select string
if ( ! empty($this->select_string))
{
// Replace the star with the selected fields
$sql = str_replace('*', $this->select_string, $sql);
}
// Set the where string
if ( ! empty($this->query_map))
{
foreach($this->query_map as $q)
{
$sql .= $q['conjunction'] . $q['string'];
}
}
// Set the group_by string
if ( ! empty($this->group_string))
{
$sql .= $this->group_string;
}
// Set the order_by string
if ( ! empty($this->order_string))
{
$sql .= $this->order_string;
}
// Set the limit via the class variables
if (isset($this->limit) && is_numeric($this->limit))
{
$sql = $this->sql->limit($sql, $this->limit, $this->offset);
}
echo $sql."<br />";
return $sql;
}

24
tests/databases/firebird-qb.php
View File

@ -37,7 +37,7 @@ class FirebirdQBTest extends UnitTestCase {
function TestGet()
{
$query = $this->qb->get('create_test');
$query = $this->qb->get('create_test ct');
$this->assertTrue(is_resource($query));
}
@ -76,7 +76,6 @@ class FirebirdQBTest extends UnitTestCase {
$this->assertTrue(is_resource($query));
}
function TestSelectGet()
{
$query = $this->qb->select('id, key as k, val')
@ -133,6 +132,18 @@ class FirebirdQBTest extends UnitTestCase {
$this->assertTrue(is_resource($query));
}
function TestOrWhere()
{
$query = $this->qb->select('id, key as k, val')
->from('create_test')
->where(' id ', 1)
->or_where('key >', 0)
->limit(2, 1)
->get();
$this->assertTrue(is_resource($query));
}
/*function TestGroupBy()
{
$query = $this->qb->select('id, key as k, val')
@ -149,6 +160,15 @@ class FirebirdQBTest extends UnitTestCase {
$this->assertTrue(is_resource($query));
}*/
function TestLike()
{
$query = $this->qb->from('create_test')
->like('key', 'og')
->get();
$this->assertTrue(is_resource($query));
}
function TestInsert()
{
$query = $this->qb->set('id', 4)

23
tests/databases/sqlite-qb.php
View File

@ -33,7 +33,7 @@
function TestGet()
{
$query = $this->qb->get('create_test');
$query = $this->qb->get('create_test ct');
$this->assertIsA($query, 'PDOStatement');
}
@ -143,6 +143,27 @@
$this->assertIsA($query, 'PDOStatement');
}
function TestOrWhere()
{
$query = $this->qb->select('id, key as k, val')
->from('create_test')
->where(' id ', 1)
->or_where('key >', 0)
->limit(2, 1)
->get();
$this->assertIsA($query, 'PDOStatement');
}
function TestLike()
{
$query = $this->qb->from('create_test')
->like('key', 'og')
->get();
$this->assertIsA($query, 'PDOStatement');
}
function TestInsert()
{
$query = $this->qb->set('id', 4)

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tests/test_dbs/FB_TEST_DB.FDB
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