Constraining Number

You may want to constrain the value of a number to a specific range or define a minimum or maximum value.

Let's add a dateOfBirth property. now we want to set specific ranges for day, month and year. we will also need to set range constraints for the age property

1{
2  "name": "John Doe ",
3  "age": 25,
4  "dateOfBirth": {
5    "day": 1,
6    "month": 1,
7    "year": 1995
8  }
9}

Schema Definition

To apply constraints on number values, you can use the following keywords:

• x ≥ minimum
• x ≤ maximum

Example: age property

1{
2  "age":{
3    "type": "integer",
4    "minimum": 18,
5    "maximum": 60
6  }
7}

Example: dateOfBirth property

1{
2  "dateOfBirth": {
3    "type": "object",
4    "properties": {
5      "year": {
6        "type": "integer",
7        "minimum": 1954,
8        "maximum": 2024
9      },
10      ...
11    }
12  }
13}

now try to modify the age and dateOfBirth properties in the side editor with the constraints mentioned below:

• age should be between 18 and 60
• dateOfBirth.year should be between 1964 and 2024
• dateOfBirth.month should be between 1 and 12
• dateOfBirth.day should be between 1 and 31