Is there is a way to convert the JSON schema to Flatbuffer schema?
The use case here is user can create the JSON schema but I am finding a way to convert the JSON schema to Flatbuffer.
Example:Input
{
"$schema": "http://json-schema.org/draft-04/schema#",
"definitions": {
"MyGame_Sample_Color": {
"type": "string",
"enum": [
"Red",
"Green",
"Blue"
]
},
"MyGame_Sample_Monster": {
"type": "object",
"properties": {
"mana": {
"type": "number"
},
"hp": {
"type": "number"
},
"name": {
"type": "string"
},
"friendly": {
"type": "boolean"
},
"inventory": {
"type": "array",
"items": {
"type": "number"
}
},
"color": {
"$ref": "#/definitions/MyGame_Sample_Color"
}
},
"additionalProperties": false
}
},
"$ref": "#/definitions/MyGame_Sample_Monster"
}
Output:
namespace MyGame.Sample;
enum Color:byte { Red = 0, Green, Blue = 2 }
table Monster {
mana:short = 150;
hp:short = 100;
name:string;
friendly:bool = false (deprecated);
inventory:[ubyte]; // Vector of scalars.
color:Color = Blue; // Enum.
}
root_type Monster;
I knew the reverse way is available. But i don't know how to convert the JSON schema to flatbuffer schema
I have put together a naive converter, which I use with genson output with varying degrees of success. It can be a good starting point though:
https://gist.github.com/romanbsd/da181151170e396e8e36a6576f045aa2
Related
Can I put check on two fields in JSON schema ? Both field are of type array of objects. Conditions:
Either one of them can contain value at a time (i.e. other should be empty).
Both can be empty.
Any leads ?
// The schema
var schema = {
"id": "https://kitoutapi.lrsdedicated.com/v1/json_schemas/login-request#",
"$schema": "http://json-schema.org/draft-04/schema#",
"description": "Login request schema",
"type": "object",
"oneOf": [
{ "categories": {
"maxItems": 0
},
"positionedOffers": {
"minItems": 1
}},
{ "categories": {
"minItems": 1
},
"positionedOffers": {
"maxItems": 0
}}
],
"properties": {
"categories": {
"type": "array"
},
"positionedOffers": {
"type": "array"
}
},
"additionalProperties": false
};
// Test data 1
// This test should return a good result
var data1 = {
"positionedOffers":['hello'],
"categories":[],
}
For your requirement, I think I'd come at this from the other direction. Rather than saying
If one contains a value, the other must be empty, but both may be empty.
I'd say
At least one must be empty.
That leads you to use an anyOf with subschemas checking that each property is an empty array.
{
"id": "https://kitoutapi.lrsdedicated.com/v1/json_schemas/login-request#",
"$schema": "http://json-schema.org/draft-04/schema#",
"description": "Login request schema",
"type": "object",
"anyOf": [
{
"properties": {
"categories": {
"maxItems": 0
}
}
},
{
"properties": {
"positionedOffers": {
"maxItems": 0
}
}
}
],
"properties": {
"categories": {
"type": "array"
},
"positionedOffers": {
"type": "array"
}
},
"additionalProperties": false
}
Bonus Material
In your original post, you omitted the properties keywords under the oneOf. This may have been the cause of the schema's failure to validate. I've added it in the above.
Secondly, draft 4 is quite old at this point. You may be limited by the implementation you're using, but if you can, you should consider using a more recent version of JSON Schema. You can view available implementations and what versions they support on the JSON Schema implementations page.
I am validating the json with json_schema.
Allowed values for ghrBillingCode should be only "I9NOT"
expected result should be error as 2nd and 3rd node is not I9NOT but it is validating json as correct.
What is wrong in json-schema i am using
{
"$schema": "http://json-schema.org/draft-04/schema#",
"type": "array",
"items": [
{
"type": "object",
"properties": {
"invoiceLineInfo": {
"type": "array",
"items": [
{
"type": "object",
"properties": {
"ghrBillingCode": {
"type": "string",
"enum": [
"I9NOT"
]
},
"quantity": {
"type": "integer"
}
}
}
]
},
"invoiceNumber": {
"type": "string"
}
}
}
]
}
json:
[
{
"invoiceLineInfo":[
{
"ghrBillingCode":"I9NOT",
"quantity":1
},
{
"ghrBillingCode":"I9NOTRU",
"quantity":2
},
{
"ghrBillingCode":"I9PSUP",
"quantity":1
}
],
"invoiceNumber":"202203010100301"
}
]
In your schema, you have extra brackets [] around the items array type. This means that the enum is checked for the first array element only and your example validates because the first item happens to be "I9NOT".
From your sample document, it seems like you expect the enum to apply to all array elements. To achieve this, simply drop the [] from the items value.
For the array / items syntax, have a look here:
https://json-schema.org/understanding-json-schema/reference/array.html#items
I am new to defining JSON schema and validating json against the schema.
Here is a sample json for which I want to define a json schema template for validation:
{
"version": "1.0",
"config": {
"globalConfig": {
“ClientNames”: [
“client1”, “client2”, “client3”
]
},
“ClientConfigs”: [
{
“ClientName”: “client1”,
“property1”: “some value”,
“property2”: “some value”
},
{
“ClientName”: “client2”,
“property1”: “some value”,
“property2”: “some value”
},
{
“ClientName”: “client3”,
“property1”: “some value”,
“property2”: “some value”
}
]
}
From what I understand “ClientConfigs” would be an array of object (let’s say ClientConfig) which will contain clientName, property1 and property2. Here is what I think schema would like:
{
"$schema": "http://json-schema.org/draft-01/schema#",
"title": "ClientConfig",
"type": "object",
"description": "Some configuration",
"properties": {
"version": {
"type": "string"
},
"config": {
"$ref": "#/definitions/config"
}
},
"definitions": {
"config": {
"type": "object",
"properties": {
"globalConfig": {
"type": "object",
"description": "Global config for all clients",
"properties": {
"ClientNames": {
"type": "array",
"minItems": 1,
"items": {
"type": "string"
}
}
}
},
"ClientConfigs": {
"type": "array",
"description": "List of configs for different clients",
"minItems": 1,
"items": {
"$ref": "#/definitions/ClientConfig"
}
}
}
},
"ClientConfig": {
"type": "object",
"properties": {
"ClientName": {
"type": "string"
},
"property1": {
"type": "string"
},
"property2": {
"type": "string"
}
}
}
}
}
I want to validate 2 things with jsonschema:
ClientName in every element of ClientConfigs array is one of the values from “ClientNames” i.e. individual ClientConfig in “ClientConfigs” array should only contain client names defined in property “ClientNames”.
Every clientName present in “ClientNames” should be defined as an element in “ClientConfigs” array. To be more precise, ClientConfig is defined for every clientName present in “ClientNames” property.
Here is an example which is NOT valid according to my requirements:
{
"version": "1.0",
"config": {
"globalConfig": {
“ClientNames”: [
“client1”, “client2”, “client3”
]
},
“ClientConfigs”: [
{
“ClientName”: “client4”,
“property1”: “some value”,
“property2”: “some value”
}
]
}
It is invalid because:
It doesn’t define ClientConfig for client1, client2 and client3.
It defines ClientConfig for client4 which is not present in “ClientNames”.
Is it possible to do such validation using json schema template? If yes, how to validate the same?
You cannot reference instance data in your JSON Schema. This is considered business logic and is out side of the scope for JSON Schema.
I am new to JSON schemas. I have a property (property1) that is dependent on another property (property2), which in turn is dependent on a third property (property3). I am trying to figure out how to prevent the schema from validating property1 if property2 doesn't exist. I am using the Python jsonschema module for validating.
I have a simple schema with three properties: species, otherDescription, and otherDescriptionDetail. The rules I'm trying to enforce are:
1) if species = "Human", otherDescription is required.
2) if species = "Human" and otherDescription != "None", otherDescriptionDetail is required.
3) if species != "Human", neither of the other two fields is required.
My test JSON correctly fails validation if species is "Human" and otherDescription doesn't exist, but it also reports that otherDescriptionDetail is a required property even though at this point it shouldn't be because there is no otherDescription value to compare it against. Is it possible to implement this logic with a JSON schema?
This is my schema:
"$schema": "http://json-schema.org/draft-07/schema#",
"$id":"http://example.com/test_schema.json",
"title": "annotations",
"description": "Validates file annotations",
"type": "object",
"properties": {
"species": {
"description": "Type of species",
"anyOf": [
{
"const": "Human",
"description": "Homo sapiens"
},
{
"const": "Neanderthal",
"description": "Cave man"
}
]
},
"otherDescription": {
"type": "string"
},
"otherDescriptionDetail": {
"type": "string"
}
},
"required": [
"species"
],
"allOf": [
{
"if": {
"properties": {
"species": {
"const": "Human"
}
}
},
"then": {
"required": ["otherDescription"]
}
},
{
"if": {
"allOf": [
{
"properties": {
"species": {
"const": "Human"
},
"otherDescription": {
"not": {"const": "None"}
}
}
}
]
},
"then": {
"required": ["otherDescriptionDetail"]
}
}
]
}
My test JSON is:
{
"species": "Human"
}
The output that I want:
0: 'otherDescription' is a required property
The output that I am getting:
0: 'otherDescription' is a required property
1: 'otherDescriptionDetail' is a required property
Any help would be greatly appreciated.
You need to defined otherDescription as a required property insilde allOf. Otherwise allOf block will pass even if otherDescription not available.
"if": {
"allOf": [
{
"properties": {
"species": {
"const": "Human"
},
"otherDescription": {
"not": {"const": "None"}
}
},
"required": ["otherDescription"]
}
]
},
"then": {
"required": ["otherDescriptionDetail"]
}
Based some condition my IPV4 can have either 2 or 3 properties but those are required. How to define it. I tried below schema. I get error saying "JSON is valid against more than one schema from 'oneOf'. Valid schema indexes: 0, 1"
"IPv4Type": {
"type": "object",
"oneOf": [
{
"properties": {
"provider-address": {
"type": "string",
"format": "ipv4"
},
"customer-address": {
"type": "string",
"format": "ipv4"
},
"mask": {
"type": "number"
}
},
"required": [
"provider-address",
"customer-address",
"mask"
]
},
{
"properties": {
"provider-address": {
"type": "string",
"format": "ipv4"
},
"mask": {
"type": "number"
}
},
"required": [
"provider-address",
"mask"
]
}
]
}
A few ideas:
you can drop the oneOf , define your JSON in one object, with all 3 properties defined, but adding only "provider-address" and "mask" as required
defining "additionalProperties": false the the 2nd definition under oneOf
replacing oneOf with anyOf