Update Coupon - Plugixa Car Rental for WordPress

Update Coupon - Plugixa Car Rental

PUT /plugixa-car-rental/v1/coupons/{id}

Change a coupon. Only the fields you send are changed; PATCH works the same way.

Needs the Coupons app on. The user needs the plugixa_car_rental_edit capability.

Request

PUT https://your-site.example/wp-json/plugixa-car-rental/v1/coupons/7

Path parameters

Name	Type	Description
`id`	`integer`	The coupon’s id

Request body

Content type: application/json

Field	Type	Required	Description
`code`	`string`	No	Letters, digits, dashes and underscores: anything else is removed, then it is cut to 50 characters. Must not match another live coupon’s code, ignoring case.
`amount`	`number`	No	More than `0`. At most `100` for a percentage. Rounded to 2 decimals.
`discount_type`	`string`	No	`percent` or `fixed`. A fixed discount never takes more than the subtotal.
`min_days`	`integer`	No	Shortest rental it applies to. At least `1`, the default.
`usage_limit`	`integer`	No	Most uses. `0` for no limit.
`valid_from`	`string`	No	First day, `YYYY-MM-DD`, on the site’s calendar. Empty for no start.
`valid_until`	`string`	No	Last day, `YYYY-MM-DD`. On or after `valid_from`. Empty for no end.
`description`	`string`	No	Your note, up to 255 characters.
`status`	`string`	No	`published` or `unpublished`.
`modified_at`	`string`	No	The `modified_at` you read. When it differs from the stored one the update is refused with `409`. See Edit conflicts.

Fields you leave out keep their stored value. The whole coupon, as it would be after the change, is checked again.

{
  "usage_limit": 150,
  "modified_at": "2026-11-12 09:30:00"
}

Responses

`200` OK. `data` is the coupon as it now is.

{
  "success": true,
  "data": {
    "id": 7,
    "code": "WINTER10",
    "code_key": "WINTER10",
    "description": "Winter campaign",
    "discount_type": "percent",
    "amount": 10.0,
    "min_days": 2,
    "valid_from": "2026-12-01",
    "valid_until": "2027-02-28",
    "usage_limit": 150,
    "status": "published",
    "created_by": 1,
    "modified_by": 1,
    "created_at": "2026-11-12 09:30:00",
    "modified_at": "2026-11-12 10:15:00",
    "deleted_at": null,
    "used": 14
  }
}

Field	Type	Meaning
`data.usage_limit`	`integer`	Most uses, `0` for no limit
`data.modified_at`	`string`	UTC datetime of this change

Errors

Status	Code	When
`404`	`plugixa_car_rental_not_found`	No coupon with that id, or it is in the trash.
`422`	`plugixa_car_rental_invalid`	`code` is empty after cleaning, `amount` is not above 0 or a percentage above 100, `min_days` is below 1, `usage_limit` is negative, or `valid_until` is before `valid_from`. `data.field` names the field.
`409`	`plugixa_car_rental_invalid`	Another live coupon already uses this code.
`422`	`plugixa_car_rental_invalid_date`	`valid_from` or `valid_until` is not a date.
`422`	`plugixa_car_rental_invalid_choice`	`status` or `discount_type` is not one of its values. `data.allowed` lists them.
`422`	`plugixa_car_rental_not_a_number`	A number field was sent as something else. `data.field` names it.
`422`	`plugixa_car_rental_negative_number`	A number field that cannot be negative is. `data.field` names it.
`422`	`plugixa_car_rental_too_long`	A text field is longer than its column. `data.field` names it and `data.max` gives the limit.
`409`	`plugixa_car_rental_conflict`	You sent `modified_at` and the coupon has been saved by someone else since. `data.expected` and `data.current` carry both values.

Plus the errors every endpoint can return.

Examples

curl -s -X PUT "https://your-site.example/wp-json/plugixa-car-rental/v1/coupons/7" \
  -u "admin:$WP_APP_PASSWORD" \
  -H "Content-Type: application/json" \
  -d '{"usage_limit":150,"modified_at":"2026-11-12 09:30:00"}'

<?php
$ch = curl_init('https://your-site.example/wp-json/plugixa-car-rental/v1/coupons/7');
curl_setopt_array($ch, [
    CURLOPT_CUSTOMREQUEST  => 'PUT',
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_USERPWD        => 'admin:' . getenv('WP_APP_PASSWORD'),
    CURLOPT_HTTPHEADER     => [
        'Content-Type: application/json',
    ],
    CURLOPT_POSTFIELDS     => json_encode([
        'usage_limit' => 150,
        'modified_at' => '2026-11-12 09:30:00',
    ]),
]);
$response = json_decode(curl_exec($ch), true);
curl_close($ch);

const auth = Buffer.from(`admin:${process.env.WP_APP_PASSWORD}`).toString('base64');
const response = await fetch('https://your-site.example/wp-json/plugixa-car-rental/v1/coupons/7', {
  method: 'PUT',
  headers: {
    'Authorization': `Basic ${auth}`,
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({ usage_limit: 150, modified_at: '2026-11-12 09:30:00' }),
});
const { data } = await response.json();