Validate - examples

Below are three examples of JSON schema validation, demonstrating different use cases: required fields with basic string validation, pattern validation, and nested structures. For more details on using JSON schema, see https://json-schema.org/.

Example 1: Required fields and basic string validation

In this JSON schema, the following fields must be included in each record. A valid example is when the field "value" is of type string and is 2-3 characters long.

brand
model
color
date

{
  "required": [
    "brand",
    "color",
    "model",
    "date"
  ],
  "properties": {
    "value": {
      "type": "string",
      "minLength": 2,
      "maxLength": 3
    }
  }
}

This record matches all of the criteria:

{
    "brand": "brand1",
    "model": "modelA",
    "color": "red",
    "date":  "20 March 2019",
    "value": "cat" 
}

This record is discarded because hamster has more than 3 characters:

{
    "brand": "brand1",
    "model": "modelA",
    "color": "red",
    "date":  "20 March 2019",
    "value": "hamster" 
}

Example 2: Pattern validation

Pattern validation is done by specifying expressions that correlate with the desired functionality. In this example, the code checks for the presence of 6 digits and 3 uppercase characters:

Another pattern validation example checks for the presence of a specific email address format:

Example 3: Nested structures

You need to use a different JSON schema structure for more complex use cases with nested structures like a nested array or object. To validate the following…

…use a JSON schema like: