Show all errors in json schema using json validate using python

user_9545628 0
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I am writing a Python code to validate JSON schema but it is not showing all the errors in it , only the first one. Can anyone help to fix the code so that it displays all the errors. Below is the code:

from __future__ import print_function
import sys
import json
import jsonschema
from jsonschema import validate

schema = {
    "type" : "object",
    "properties" : {
        "price" : {"type" : "number"},
        "name" : {"type" : "string"},
    },
}

data = \
[
    { "name": 20, "price": 10},        
]

print("Validating the input data using jsonschema:")
for idx, item in enumerate(data):
    try:
        validate(item, schema)
        sys.stdout.write("Record #{}: OK\n".format(idx))
    except jsonschema.exceptions.ValidationError as ve:
        sys.stderr.write("Record #{}: ERROR\n".format(idx))
        sys.stderr.write(str(ve) + "\n")
validation python json
2 Answers

To get all the validation errors in a single instance, use iter_errors() method of the validator class.

eg.:

import jsonschema

schema = {
    "type" : "object",
    "properties" : {
        "price" : {"type" : "number"},
        "name" : {"type" : "string"},
    },
}
data = { "name": 20, "price": "ten"}

validator = jsonschema.Draft7Validator(schema)

errors = validator.iter_errors(data)  # get all validation errors

for error in errors:
    print(error)
    print('------')

Output:

'ten' is not of type 'number'

Failed validating 'type' in schema['properties']['price']:
    {'type': 'number'}

On instance['price']:
    'ten'

------
20 is not of type 'string'

Failed validating 'type' in schema['properties']['name']:
    {'type': 'string'}

On instance['name']:
    20

------

The jsonschema.validate() method chooses the best match error among these by some heuristic and raises it.

user_21363120

You can add continue or pass in the except block to skip it from quiting after first exception.

user_80261470
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