PROSAGA码农传奇-Mongodb-Mongodb 2dsphere禁止空几何

<div class =“post-text”itemprop =“text”>
  <P>
    谢谢@ alex-blex的小费！
  </p>
  <P>
    为新集合使用验证器：
  </p>
   <pre class="lang-js prettyprint-override">
    <code>
      > db.createCollection("places", {validator: {"geometry.type": {$in:
... ["Point", "MultiPoint", "LineString", "MultiLineString", "Polygon", "MultiPolygon"]
... }}})
{ "ok" : 1 }
> db.places.createIndex({'geometry': '2dsphere'})
{
        "createdCollectionAutomatically" : false,
        "numIndexesBefore" : 1,
        "numIndexesAfter" : 2,
        "ok" : 1
}

</code>
  </pre>
  <P>
    现在我们无法插入空几何：
  </p>
   <pre class="lang-js prettyprint-override">
    <code>
      > db.places.insert({'geometry': []})
WriteResult({
        "nInserted" : 0,
        "writeError" : {
                "code" : 121,
                "errmsg" : "Document failed validation"
        }
})
> db.places.insert({'geometry': {}})
WriteResult({
        "nInserted" : 0,
        "writeError" : {
                "code" : 121,
                "errmsg" : "Document failed validation"
        }
})
> db.places.insert({'geometry': null})
WriteResult({
        "nInserted" : 0,
        "writeError" : {
                "code" : 121,
                "errmsg" : "Document failed validation"
        }
})

</code>
  </pre>
  <P>
    要将验证器添加到现有集合：
  </p>
   <pre class="lang-js prettyprint-override">
    <code>
      > db.places.createIndex({'geometry': '2dsphere'})
{
        "createdCollectionAutomatically" : true,
        "numIndexesBefore" : 1,
        "numIndexesAfter" : 2,
        "ok" : 1
}
> db.runCommand({ collMod: 'places', validator: {"geometry.type": {$in:
... ["Point", "MultiPoint", "LineString", "MultiLineString", "Polygon", "MultiPolygon"]
... }}})
{ "ok" : 1 }

</code>
  </pre>
</DIV>