cast

Converts field values to a specified type.

Supported formats: json jsonl

Options

Option	Type	Required	Description
fields	map	Yes	Map of field path to cast configuration

Each field entry supports:

Key	Type	Required	Description
type	string	Yes	Target type: int, float, bool, string, or time
format	string	No	Date/time parse format (Go layout string). Only valid for type: time. Defaults to RFC 3339.
true_values	list	No	Strings to treat as true. Only valid for type: bool.
false_values	list	No	Strings to treat as false. Only valid for type: bool.

Examples

Basic type conversion:

- cast:
    fields:
      age:
        type: int
      price:
        type: float
      active:
        type: bool

Custom bool values:

- cast:
    fields:
      active:
        type: bool
        true_values: [yes, "1", enabled]
        false_values: [no, "0", disabled]

Parse a date string:

- cast:
    fields:
      created_at:
        type: time
        format: "2006-01-02"

Nested fields:

- cast:
    fields:
      user.age:
        type: int
      tags[0]:
        type: string

Notes

• Field paths support dot notation (user.address) and array indexing (tags[0]).
• Default true values for bool: true, t, 1, yes, y, on.
• Default false values for bool: false, f, 0, no, n, off.
• true_values and false_values must not overlap.
• For type: time, the format string uses Go's time layout. The reference time is Mon Jan 2 15:04:05 MST 2006.
• Array fields are cast element-by-element.