Cakephp，SQL準備語句不返回正確的結果

Question

好吧，所以我是我相當新cakephp，我有一個搜索表單與多個字段，我有一些在搜索表單中可選的字段。我想要做的是當表單被提交時，檢查是否這些字段不是NULL並將它們應用到我的find（'all'）查詢中。

這是我的CTP視圖

<h2>IDX Listings</h2> 
<?php echo $this->Form->create('Listing', array('action'=>'results')); ?> 
<fieldset><legend>Location Criteria</legend> 
    <?php echo $this->Form->input('listing_countyid', array('type'=>'select', 'options'=>$counties, 'default'=>'Richmond')); ?> 
    <?php echo $this->Form->input('listing_area', array('type'=>'select', 'options'=>$areas)); ?> 
    <?php echo $this->Form->input('listing_neighborhood', array('type'=>'select', 'options'=>$hoods)); ?> 
    <?php echo $this->Form->input('listing_subdivision', array('type'=>'select')); ?> 
</fieldset> 
<fieldset><legend>Market</legend> 
    <?php echo $this->Form->input('min_price', array('type'=>'select', 'options'=>$minPrices)); ?> 
    <?php echo $this->Form->input('max_price', array('type'=>'select', 'options'=>$maxPrices)); ?> 
    <?php echo $this->Form->input('listing_yearbuilt', array('type'=>'select', 'options'=>$years, 'label'=>'Built After')); ?> 
</fieldset> 
<fieldset><legend>Size</legend> 
    <?php echo $this->Form->input('min_rooms', array('type'=>'select', 'options'=>$minRooms)); ?> 
    <?php echo $this->Form->input('max_rooms', array('type'=>'select', 'options'=>$maxRooms)); ?> 
    <?php echo $this->Form->input('min_stories', array('type'=>'select', 'options'=>$stories, 'label'=>'Min Stories')); ?> 
    <?php echo $this->Form->input('min_listing_sqfttotal', array('type'=>'select', 'options'=>$minSqft, 'label'=> 'Min Sq Ft')); 
    <?php echo $this->Form->input('max_listing_sqfttotal', array('type'=>'select', 'options'=>$maxSqft, 'label'=> 'Max Sq Ft')); 
?> 
    <?php echo $this->Form->input('min_bathrooms', array('type'=>'select', 'options'=>$minBath, 'label'=>'Min Bathrooms')); ?> 
    <?php echo $this->Form->input('max_bathrooms', array('type'=>'select', 'options'=>$maxBath, 'label'=>'Max Bathrooms')); ?> 
    <?php echo $this->Form->input('min_bedrooms', array('type'=>'select', 'options'=>$minBed, 'label'=>'Min Bedrooms')); ?> 
    <?php echo $this->Form->input('max_bedrooms', array('type'=>'select', 'options'=>$maxBed, 'label'=>'Max Bedrooms')); ?> 
</fieldset> 
<fieldset><legend>Options</legend> 
    <?php echo $this->Form->input('heat_type', array('type'=>'select', 'options'=>$heat_type, 'label'=>'Heating System')); ?> 
    <?php echo $this->Form->input('cool_type', array('type'=>'select', 'options'=>$cool_type, 'label'=>'Cooling System')); ?> 
    <?php echo $this->Form->input('irrigation_system', array('type'=>'select', 'options'=>$irrigation_system, 'label'=>'Irrigation System')); ?> 
    <?php echo $this->Form->input('handicap', array('type'=>'select', 'options'=>$handicap, 'label'=>'Handicap Equipped')); ?> 
    <?php echo $this->Form->input('fireplace', array('type'=>'select', 'options'=>$fireplace, 'label'=>'Fireplace')); ?> 
    <?php echo $this->Form->input('fence', array('type'=>'select', 'options'=>$fence, 'label'=>'Fenced')); ?> 
    <?php echo $this->Form->input('level1_mstr', array('type'=>'select', 'options'=>$level1_mstr, 'default'=>'No', 'label'=>'1st Floor Master Bedroom')); ?> 
    <?php echo $this->Form->input('level1_laundry', array('type'=>'select', 'options'=>$level1_laundry, 'default'=>'No', 'label'=>'1st Floor Laundry Room')); ?> 
</fieldset> 
    <?php echo $this->Form->submit('Search', array('target'=>"SearchResults", 'id'=>'submit')); ?> 

即標題選項字段集是可選字段 設置爲一個數組，其初始值是NULL

這裏是在我的搜索功能的可選字段值我的控制器

function results() { 
    if (!empty($this->data)) { 

     $listings = $this->Idx->find('all', array(
      'conditions'=>array(
       'listing_countyid' => $this->data['Listing']['listing_countyid'], 
       'listing_area' => $this->data['Listing']['listing_area'], 
       'listing_neighborhood' => $this->data['Listing']['listing_neighborhood'], 
       'listing_listprice >=' => $this->data['Listing']['min_price'], 
       'listing_listprice <=' => $this->data['Listing']['max_price'], 
       'listing_rooms >=' => $this->data['Listing']['min_rooms'], 
       'listing_rooms <=' => $this->data['Listing']['max_rooms'], 
       'listing_sqfttotal >=' => $this->data['Listing']['min_listing_sqfttotal'], 
       'listing_sqfttotal <=' => $this->data['Listing']['max_listing_sqfttotal'], 
       'listing_stories >=' => $this->data['Listing']['min_stories'], 
       'listing_yearbuilt >=' => $this->data['Listing']['listing_yearbuilt'], 
       'listing_bathstotal >=' => $this->data['Listing']['min_bathrooms'], 
       'listing_bathstotal <=' => $this->data['Listing']['max_bathrooms'], 
       'listing_bedrooms >=' => $this->data['Listing']['min_bedrooms'], 
       'listing_bedrooms <=' => $this->data['Listing']['max_bedrooms'], 
       'listing_roommasterbrlevel' => $this->data['Listing']['level1_mstr'], 
       'listing_roomlaundrylevel' => $this->data['Listing']['level1_laundry'], 
       'listing_heatsystem' => $this->data['Listing']['heat_type'], 
       'listing_coolsystem' => $this->data['Listing']['cool_type'], 
       'listing_irrigationsrc' => $this->data['Listing']['irrigation_system'], 
       'listing_fireplaces' => $this->data['Listing']['fireplace'], 
       'listing_handicap' => $this->data['Listing']['handicap'], 
       'listing_fence' => $this->data['Listing']['fence'] 
      ) 
     )); 
     $this->set('listings', $listings); 
    } 
} 

如果我從find（）查詢中刪除選項，返回的結果是正確的，但是一旦設置了值該視圖我不會返回正確的結果。我知道find（）準備好的語句後面的SQL語法是SELECT * FROM table WHERE column_name AND column_name等。但是，將NULL值傳遞給數據庫將（1）不返回結果或（2）返回錯誤的結果。我已經在控制器中用OR語句嘗試了許多不同的方法，但是OR是泛化的並返回許多結果。

有沒有一種方法可以通過beforeFind（）函數來修改控制器或我的模型中的SQL語句（beforeFind超出我的知識範圍，並且很難找到它正在使用的實例），或者我最好檢查值並修改Model __construct（）函數中的SQL語句？

Answer 1

$conditions = array(); 
// it's a postback, so the key should exist 
if($this->data['Listing']['listing_countyid'] !== '') 
{ 
    $conditions['listing_countryid'] = $this->data['Listing']['listing_countyid']; 
} 
if($this->data['Listing']['listing_area'] !== '') 
{ 
    $conditions['listing_area'] = $this->data['Listing']['listing_area']; 
} 
if($this->data['Listing']['listing_neighborhood'] !== '') 
{ 
    $conditions['listing_neighborhood'] = $this->data['Listing']['listing_neighborhood']; 
} 
if($this->data['Listing']['min_price'] !== '') 
{ 
    $conditions['listing_listprice >='] = $this->data['Listing']['min_price']; 
} 
if($this->data['Listing']['max_price'] !== '') 
{ 
    $conditions['listing_listprice <='] = $this->data['Listing']['max_price']; 
} 

我敢肯定，你可以看到我在做什麼，你應該能夠完成其他params。然後，您可以將$conditions分配給find函數調用中的條件鍵。

$listings = $this->Idx->find('all', array(
    'conditions' => $conditions 
)); 

我認爲分配在一個循環中$condtions，但可能是有點複雜與最小值和最大值。