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POPeewee syntax for selecting on null field
 

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    <p>I have researched this everywhere and can't seem to find an answer. I hope I haven't duplicated this (as it's my first question on SO).</p> <p>I am trying to write a select query with Peewee that would normally go ... WHERE foo = NULL; in SQL world.</p> <p>MySQL looks like this:</p> <pre><code>+-----------+-------------+------+-----+---------+----------------+ | Field | Type | Null | Key | Default | Extra | +-----------+-------------+------+-----+---------+----------------+ | id | bigint(20) | NO | PRI | NULL | auto_increment | | user | varchar(30) | NO | | NULL | | | peer | varchar(30) | NO | | NULL | | | deleted | date | YES | | NULL | | | confirmed | date | YES | | NULL | | +-----------+-------------+------+-----+---------+----------------+ </code></pre> <p>My select query looks like this:</p> <pre><code>Peers.select().where(Peers.user == 'foo' and Peers.deleted is None) </code></pre> <p>But it doesn't work! I've tried <code>Peers.deleted == ""</code> and <code>Peers.deleted == "NULL"</code>. The MySQL syntax should end in <code>WHERE deleted is NULL;</code> but nothing in Peewee seems to be doing that.</p> <p>Can anyone help? What am I missing from the docs?</p> <p>Updated from Foo Bar User's comment: <code>and not Peers.deleted</code> didn't work, but it led me to more information. It seems that peewee wants the <code>where</code> clauses chained together. So instead of </p> <p><code>Peers.select().where(Peers.user == 'foo' and Peers.deleted is None)</code></p> <p>it should be:</p> <p><code>Peers.select().where(Peers.user == 'foo').where(Peers.deleted is None)</code></p> <p>Sadly, that still doesn't yield the right syntax to select on null rows in deleted.</p>
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    1. COmaybe `and not Peers.deleted`
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