php - 具有多个表连接的 Zend DB Select

Question

尝试使用 Zend_Db_Select 复制以下查询。有什么指点吗？

SELECT 
  compounds.id as compounds_id,
  reactions.id as reactions_id, 
  reaction_compound.number as reaction_compound_number  
FROM compounds, reactions, reaction_compound 
WHERE  
  compounds.id IN (68,74,112) 
  AND compounds.id = reaction_compound.compound  
  AND reactions.id = reaction_compound.reaction;

具体来说，我遇到的一些问题是在 Zend 中进行多表连接。我不确定如何使用他们的查询构建器跨多个表进行连接。

感谢任何帮助!

J

Answer 1

类似的东西:

$compoundIds = array(68,74,112);
$select = $db->select()
   ->from('compounds', array('compounds_id' => 'id')
   ->where('compounds.id in ( ? )', $compoundIds)
   ->join('reaction_compound', 'compounds.id = reaction_compound.compound', array('reaction_compound_number' => 'number'))
   ->join('reactions', 'reactions.id = reaction_compound.reaction', array('reaction_id' => 'id');

这应该能带你到某个地方。我没有测试它，所以那里可能有一些错误。