diff options
Diffstat (limited to 'jsonschema/validators.py')
-rw-r--r-- | jsonschema/validators.py | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/jsonschema/validators.py b/jsonschema/validators.py index d119219..22abf57 100644 --- a/jsonschema/validators.py +++ b/jsonschema/validators.py @@ -462,6 +462,46 @@ def validator_for(schema, default=_unset): def validate(instance, schema, cls=None, *args, **kwargs): + """ + Validate an instance under the given schema. + + >>> validate([2, 3, 4], {"maxItems" : 2}) + Traceback (most recent call last): + ... + ValidationError: [2, 3, 4] is too long + + :func:`validate` will first verify that the provided schema is itself + valid, since not doing so can lead to less obvious error messages and fail + in less obvious or consistent ways. If you know you have a valid schema + already or don't care, you might prefer using the + :meth:`~IValidator.validate` method directly on a specific validator + (e.g. :meth:`Draft4Validator.validate`). + + + :argument instance: the instance to validate + :argument schema: the schema to validate with + :argument cls: an :class:`IValidator` class that will be used to validate + the instance. + + If the ``cls`` argument is not provided, two things will happen in + accordance with the specification. First, if the schema has a + :validator:`$schema` property containing a known meta-schema [#]_ then the + proper validator will be used. The specification recommends that all + schemas contain :validator:`$schema` properties for this reason. If no + :validator:`$schema` property is found, the default validator class is + :class:`Draft4Validator`. + + Any other provided positional and keyword arguments will be passed on when + instantiating the ``cls``. + + :raises: + :exc:`ValidationError` if the instance is invalid + + :exc:`SchemaError` if the schema itself is invalid + + .. rubric:: Footnotes + .. [#] known by a validator registered with :func:`validates` + """ if cls is None: cls = validator_for(schema) cls.check_schema(schema) |