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Base class for classes that require validation.
Inherits From: ValidatedBase, expected_type
google.appengine.api.validation.Validated(
**attributes
)
A class which intends to use validated fields should sub-class itself from this class. Each class should define an 'ATTRIBUTES' class variable which should be a map from attribute name to its validator. For example:
class Story(Validated):
ATTRIBUTES = {'title': Type(str),
'authors': Repeated(Type(str)),
'isbn': Optional(Type(str)),
'pages': Type(int),
}
```
Attributes that are not listed under `ATTRIBUTES` work like normal and are
not validated upon assignment.
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<tr><th colspan="2"><h2 class="add-link">Raises</h2></th></tr>
<tr>
<td>
`AttributeDefinitionError`
</td>
<td>
When class instance is missing `ATTRIBUTE`
definition or when `ATTRIBUTE` is of the wrong type.
</td>
</tr>
</table>
## Methods
<h3 id="CheckInitialized"><code>CheckInitialized</code></h3>
<a target="_blank" href="https://github.com/GoogleCloudPlatform/appengine-python-standard/tree/main/src/google/appengine/api/validation.py#L395-L398">View source</a>
<pre class="devsite-click-to-copy prettyprint lang-py tfo-signature-link devsite-disable-click-to-copy" suppresswarning>
<code>CheckInitialized()
</code></pre>
Checks for missing or conflicting attributes.
Subclasses should override this function and raise an exception for
any errors. Always run this method when all assignments are complete.
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<tr><th colspan="2">Raises</th></tr>
<tr>
<td>
`ValidationError`
</td>
<td>
When there are missing or conflicting attributes.
</td>
</tr>
</table>
<h3 id="Get"><code>Get</code></h3>
<a target="_blank" href="https://github.com/GoogleCloudPlatform/appengine-python-standard/tree/main/src/google/appengine/api/validation.py#L366-L378">View source</a>
<pre class="devsite-click-to-copy prettyprint lang-py tfo-signature-link devsite-disable-click-to-copy" suppresswarning>
<code>Get(
key
)
</code></pre>
Get a single value on Validated instance.
This method can only be used to retrieve validated attributes.
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<tr>
<td>
`key`
</td>
<td>
The name of the attributes
</td>
</tr>
</table>
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<tr><th colspan="2">Raises</th></tr>
<tr class="alt">
<td colspan="2">
`ValidationError` when no validated attribute exists on class.
</td>
</tr>
</table>
<h3 id="GetUnnormalized"><code>GetUnnormalized</code></h3>
<a target="_blank" href="https://github.com/GoogleCloudPlatform/appengine-python-standard/tree/main/src/google/appengine/api/validation.py#L358-L364">View source</a>
<pre class="devsite-click-to-copy prettyprint lang-py tfo-signature-link devsite-disable-click-to-copy" suppresswarning>
<code>GetUnnormalized(
key
)
</code></pre>
Get a single value on the `Validated` instance, without normalizing.
<h3 id="GetValidator"><code>GetValidator</code></h3>
<a target="_blank" href="https://github.com/GoogleCloudPlatform/appengine-python-standard/tree/main/src/google/appengine/api/validation.py#L317-L335">View source</a>
<pre class="devsite-click-to-copy prettyprint lang-py tfo-signature-link devsite-disable-click-to-copy" suppresswarning>
<code>@classmethod</code>
<code>GetValidator(
key
)
</code></pre>
Safely get the underlying attribute definition as a `Validator`.
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<tr>
<td>
`key`
</td>
<td>
Name of attribute to get.
</td>
</tr>
</table>
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<tr><th colspan="2">Returns</th></tr>
<tr class="alt">
<td colspan="2">
Validator associated with key or attribute value wrapped in a
validator.
</td>
</tr>
</table>
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<td>
`ValidationError`
</td>
<td>
if no such attribute exists.
</td>
</tr>
</table>
<h3 id="GetWarnings"><code>GetWarnings</code></h3>
<a target="_blank" href="https://github.com/GoogleCloudPlatform/appengine-python-standard/tree/main/src/google/appengine/api/validation.py#L337-L342">View source</a>
<pre class="devsite-click-to-copy prettyprint lang-py tfo-signature-link devsite-disable-click-to-copy" suppresswarning>
<code>GetWarnings()
</code></pre>
Return all the warnings we've got, along with their associated fields.
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<tr class="alt">
<td colspan="2">
A list of tuples of (dotted_field, warning), both strings.
</td>
</tr>
</table>
<h3 id="Set"><code>Set</code></h3>
<a target="_blank" href="https://github.com/GoogleCloudPlatform/appengine-python-standard/tree/main/src/google/appengine/api/validation.py#L344-L356">View source</a>
<pre class="devsite-click-to-copy prettyprint lang-py tfo-signature-link devsite-disable-click-to-copy" suppresswarning>
<code>Set(
key, value
)
</code></pre>
Set a single value on `Validated` instance.
This method can only be used to assign validated attributes.
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<tr><th colspan="2">Args</th></tr>
<tr>
<td>
`key`
</td>
<td>
The name of the attributes
</td>
</tr><tr>
<td>
`value`
</td>
<td>
The value to set
</td>
</tr>
</table>
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<tr><th colspan="2">Raises</th></tr>
<tr class="alt">
<td colspan="2">
`ValidationError` when no validated attribute exists on class.
</td>
</tr>
</table>
<h3 id="SetMultiple"><code>SetMultiple</code></h3>
<a target="_blank" href="https://github.com/GoogleCloudPlatform/appengine-python-standard/tree/main/src/google/appengine/api/validation.py#L197-L209">View source</a>
<pre class="devsite-click-to-copy prettyprint lang-py tfo-signature-link devsite-disable-click-to-copy" suppresswarning>
<code>SetMultiple(
attributes
)
</code></pre>
Set multiple values on Validated instance.
All attributes will be validated before being set.
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<td>
`attributes`
</td>
<td>
A dict of attributes/items to set.
</td>
</tr>
</table>
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<tr><th colspan="2">Raises</th></tr>
<tr>
<td>
`ValidationError`
</td>
<td>
When no validated attribute exists on class.
</td>
</tr>
</table>
<h3 id="ToDict"><code>ToDict</code></h3>
<a target="_blank" href="https://github.com/GoogleCloudPlatform/appengine-python-standard/tree/main/src/google/appengine/api/validation.py#L476-L494">View source</a>
<pre class="devsite-click-to-copy prettyprint lang-py tfo-signature-link devsite-disable-click-to-copy" suppresswarning>
<code>ToDict()
</code></pre>
Convert Validated object to a dictionary.
Recursively traverses all of its elements and converts everything to
simplified collections.
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<tr><th colspan="2">Returns</th></tr>
<tr class="alt">
<td colspan="2">
A dict of all attributes defined in this classes `ATTRIBUTES` mapped
to its value. This structure is recursive in that Validated objects
that are referenced by this object and in lists are also converted to
dicts.
</td>
</tr>
</table>
<h3 id="ToYAML"><code>ToYAML</code></h3>
<a target="_blank" href="https://github.com/GoogleCloudPlatform/appengine-python-standard/tree/main/src/google/appengine/api/validation.py#L251-L260">View source</a>
<pre class="devsite-click-to-copy prettyprint lang-py tfo-signature-link devsite-disable-click-to-copy" suppresswarning>
<code>ToYAML()
</code></pre>
Print validated object as simplified YAML.
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<td colspan="2">
Object as a simplified YAML string compatible with parsing using the
`SafeLoader`.
</td>
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</table>
<h3 id="__eq__"><code>__eq__</code></h3>
<a target="_blank" href="https://github.com/GoogleCloudPlatform/appengine-python-standard/tree/main/src/google/appengine/api/validation.py#L437-L454">View source</a>
<pre class="devsite-click-to-copy prettyprint lang-py tfo-signature-link devsite-disable-click-to-copy" suppresswarning>
<code>__eq__(
other
)
</code></pre>
Equality operator.
Comparison is done by comparing all attribute values to those in the other
instance. Objects which are not of the same type are not equal.
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<td>
`other`
</td>
<td>
Other object to compare against.
</td>
</tr>
</table>
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<tr class="alt">
<td colspan="2">
`True` if validated objects are equal, else `False`.
</td>
</tr>
</table>
<h3 id="__ne__"><code>__ne__</code></h3>
<a target="_blank" href="https://github.com/GoogleCloudPlatform/appengine-python-standard/tree/main/src/google/appengine/api/validation.py#L456-L458">View source</a>
<pre class="devsite-click-to-copy prettyprint lang-py tfo-signature-link devsite-disable-click-to-copy" suppresswarning>
<code>__ne__(
other
)
</code></pre>
Inequality operator.
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<tr><th colspan="2"><h2 class="add-link">Class Variables</h2></th></tr>
<tr>
<td>
ATTRIBUTES<a id="ATTRIBUTES"></a>
</td>
<td>
`None`
</td>
</tr>
</table>