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Add support for JSON Schema 7 if/then/else #426

@williamrijksen

Description

@williamrijksen

When I copy the schema which is also on the JSON schemas documentation it's not recognizing the postal_code statements to be included.

It's just converting to the following, missing the postal_code.

export type Demo = {
  [k: string]: unknown;
} & {
  street_address?: string;
  country?: "United States of America" | "Canada" | "Netherlands";
  [k: string]: unknown;
};

How could we solve this issue?

{
  "type": "object",
  "properties": {
    "street_address": {
      "type": "string"
    },
    "country": {
      "default": "United States of America",
      "enum": ["United States of America", "Canada", "Netherlands"]
    }
  },
  "allOf": [
    {
      "if": {
        "properties": { "country": { "const": "United States of America" } }
      },
      "then": {
        "properties": { "postal_code": { "pattern": "[0-9]{5}(-[0-9]{4})?" } }
      }
    },
    {
      "if": {
        "properties": { "country": { "const": "Canada" } },
        "required": ["country"]
      },
      "then": {
        "properties": { "postal_code": { "pattern": "[A-Z][0-9][A-Z] [0-9][A-Z][0-9]" } }
      }
    },
    {
      "if": {
        "properties": { "country": { "const": "Netherlands" } },
        "required": ["country"]
      },
      "then": {
        "properties": { "postal_code": { "pattern": "[0-9]{4} [A-Z]{2}" } }
      }
    }
  ]
}

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