title: Sqlalchemy: how to filter multiple conditions with filter_rule
body: <p>I am using python and sqlalchemy and want to perform a query with filters, using <code>filter_rule</code>.</p>
  
  <p>I have these DB records:</p>
  
  <pre><code>{"name":"xyz","age":40,"location":"ABC","salary":10000}
  </code></pre>
  
  <p>And I would like to make a query like this:</p>
  
  <pre><code>select * from my_table where age&lt;50 and salary&gt;8000;
  </code></pre>
  
  <p>I understand that I can use <code>filter_rule="model.age &lt; 50 and model.salary &gt; 8000"</code> but it doesn't seem to work properly for me with the greater than and less than symbols.</p>
  
  <p>However, the <code>filter_rule</code> works perfectly fine if I have equality conditions like <code>age==50</code> and <code>salary==10000</code>. </p>
  
  <p>Could someone explain this?</p>