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125 lines
3.9 KiB
Markdown
125 lines
3.9 KiB
Markdown
---
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id: 6a0dcc730cb92a616f86f0c2
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title: "Challenge 298: Schema Validator Part 4"
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challengeType: 29
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dashedName: challenge-298
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---
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# --description--
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Given an object (JavaScript) or dictionary (Python), determine if it matches the following schema:
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```json
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Roles = "user" | "creator" | "moderator" | "staff" | "admin"
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{
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username: string,
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posts: number,
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verified: boolean,
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role: Roles,
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supporter?: boolean
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}
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```
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- The pipe (`|`) symbol means "or". `role` must be one of the listed `Roles` values.
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- The question mark (`?`) after `supporter` means that the field is optional, but is the specified type if it exists.
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- Extra keys are allowed
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# --hints--
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`is_valid_schema({"username": "vivian", "posts": 1, "verified": False, "role": "user", "supporter": True})` should return `True`.
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```js
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({test: () => { runPython(`
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from unittest import TestCase
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TestCase().assertIs(is_valid_schema({"username": "vivian", "posts": 1, "verified": False, "role": "user", "supporter": True}), True)`)
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}})
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```
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`is_valid_schema({"username": "rudolph", "posts": 15, "verified": True, "role": "creator"})` should return `True`.
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```js
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({test: () => { runPython(`
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from unittest import TestCase
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TestCase().assertIs(is_valid_schema({"username": "rudolph", "posts": 15, "verified": True, "role": "creator"}), True)`)
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}})
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```
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`is_valid_schema({"username": "hernandez", "posts": 35, "verified": True, "role": "moderator", "supporter": False, "followers": 55})` should return `True`.
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```js
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({test: () => { runPython(`
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from unittest import TestCase
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TestCase().assertIs(is_valid_schema({"username": "hernandez", "posts": 35, "verified": True, "role": "moderator", "supporter": False, "followers": 55}), True)`)
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}})
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```
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`is_valid_schema({"username": "julia", "posts": 50, "verified": True, "role": "admin", "supporter": "true"})` should return `False`.
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```js
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({test: () => { runPython(`
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from unittest import TestCase
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TestCase().assertIs(is_valid_schema({"username": "julia", "posts": 50, "verified": True, "role": "admin", "supporter": "true"}), False)`)
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}})
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```
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`is_valid_schema({"username": "bernard", "posts": 0, "verified": True, "role": "friend", "supporter": True})` should return `False`.
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```js
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({test: () => { runPython(`
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from unittest import TestCase
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TestCase().assertIs(is_valid_schema({"username": "bernard", "posts": 0, "verified": True, "role": "friend", "supporter": True}), False)`)
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}})
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```
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`is_valid_schema({"username": "felix", "posts": 40, "verified": "yes", "role": "staff", "supporter": False})` should return `False`.
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```js
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({test: () => { runPython(`
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from unittest import TestCase
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TestCase().assertIs(is_valid_schema({"username": "felix", "posts": 40, "verified": "yes", "role": "staff", "supporter": False}), False)`)
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}})
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```
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`is_valid_schema({"username": "jimmy", "posts": True, "verified": False, "role": "creator", "supporter": True})` should return `False`.
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```js
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({test: () => { runPython(`
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from unittest import TestCase
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TestCase().assertIs(is_valid_schema({"username": "jimmy", "posts": True, "verified": False, "role": "creator", "supporter": True}), False)`)
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}})
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```
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`is_valid_schema({"username": True, "posts": 30, "verified": True, "role": "moderator", "supporter": False})` should return `False`.
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```js
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({test: () => { runPython(`
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from unittest import TestCase
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TestCase().assertIs(is_valid_schema({"username": True, "posts": 30, "verified": True, "role": "moderator", "supporter": False}), False)`)
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}})
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```
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# --seed--
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## --seed-contents--
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```py
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def is_valid_schema(obj):
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return obj
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```
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# --solutions--
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```py
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def is_valid_schema(obj):
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roles = ["user", "creator", "moderator", "staff", "admin"]
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return (
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isinstance(obj.get("username"), str) and
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isinstance(obj.get("posts"), int) and not isinstance(obj.get("posts"), bool) and
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isinstance(obj.get("verified"), bool) and
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obj.get("role") in roles and
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("supporter" not in obj or isinstance(obj["supporter"], bool))
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)
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```
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