# [BETA] Create or update a milestone progression

PUT https://app.unleash-instance.example.com/api/admin/projects/{project}/features/{featureName}/environments/{environment}/progressions/{id}
Content-Type: application/json

**Enterprise feature**

**[BETA]** This API is in beta state, which means it may change or be removed in the future.

Creates or updates a milestone progression by source milestone ID. If a progression with the given source milestone exists, it will be updated; otherwise, a new one will be created.

Reference: https://docs.getunleash.io/api/release-templates/change-milestone-progression

## OpenAPI Specification

```yaml
openapi: 3.1.1
info:
  title: '[BETA] Create or update a milestone progression'
  version: endpoint_releaseTemplates.changeMilestoneProgression
paths:
  /api/admin/projects/{project}/features/{featureName}/environments/{environment}/progressions/{id}:
    put:
      operationId: change-milestone-progression
      summary: '[BETA] Create or update a milestone progression'
      description: >-
        **Enterprise feature**


        **[BETA]** This API is in beta state, which means it may change or be
        removed in the future.


        Creates or updates a milestone progression by source milestone ID. If a
        progression with the given source milestone exists, it will be updated;
        otherwise, a new one will be created.
      tags:
        - - subpackage_releaseTemplates
      parameters:
        - name: project
          in: path
          required: true
          schema:
            type: string
        - name: featureName
          in: path
          required: true
          schema:
            type: string
        - name: environment
          in: path
          required: true
          schema:
            type: string
        - name: id
          in: path
          required: true
          schema:
            type: string
        - name: Authorization
          in: header
          description: Header authentication of the form `undefined <token>`
          required: true
          schema:
            type: string
      responses:
        '200':
          description: '#/components/schemas/milestoneProgressionSchema'
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/milestoneProgressionSchema'
        '401':
          description: >-
            Authorization information is missing or invalid. Provide a valid API
            token as the `authorization` header, e.g.
            `authorization:*.*.my-admin-token`.
          content: {}
        '403':
          description: >-
            The provided user credentials are valid, but the user does not have
            the necessary permissions to perform this operation
          content: {}
      requestBody:
        description: '#/components/schemas/changeMilestoneProgressionSchema'
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/changeMilestoneProgressionSchema'
components:
  schemas:
    transitionConditionSchema:
      type: object
      properties:
        intervalMinutes:
          type: integer
          description: The interval in minutes before transitioning
      required:
        - intervalMinutes
    changeMilestoneProgressionSchema:
      type: object
      properties:
        targetMilestone:
          type: string
          description: The ID of the target milestone
        transitionCondition:
          $ref: '#/components/schemas/transitionConditionSchema'
          description: The condition configuration for the transition
      required:
        - targetMilestone
        - transitionCondition
    milestoneProgressionSchema:
      type: object
      properties:
        sourceMilestone:
          type: string
          description: The ID of the source milestone
        targetMilestone:
          type: string
          description: The ID of the target milestone
        transitionCondition:
          $ref: '#/components/schemas/transitionConditionSchema'
          description: The condition that triggers the transition
      required:
        - sourceMilestone
        - targetMilestone
        - transitionCondition

```

## SDK Code Examples

```python
import requests

url = "https://app.unleash-instance.example.com/api/admin/projects/project/features/featureName/environments/environment/progressions/id"

payload = {
    "targetMilestone": "11K7NXD655W7R89659K58RE07B",
    "transitionCondition": { "intervalMinutes": 30 }
}
headers = {
    "Authorization": "<apiKey>",
    "Content-Type": "application/json"
}

response = requests.put(url, json=payload, headers=headers)

print(response.json())
```

```javascript
const url = 'https://app.unleash-instance.example.com/api/admin/projects/project/features/featureName/environments/environment/progressions/id';
const options = {
  method: 'PUT',
  headers: {Authorization: '<apiKey>', 'Content-Type': 'application/json'},
  body: '{"targetMilestone":"11K7NXD655W7R89659K58RE07B","transitionCondition":{"intervalMinutes":30}}'
};

try {
  const response = await fetch(url, options);
  const data = await response.json();
  console.log(data);
} catch (error) {
  console.error(error);
}
```

```go
package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://app.unleash-instance.example.com/api/admin/projects/project/features/featureName/environments/environment/progressions/id"

	payload := strings.NewReader("{\n  \"targetMilestone\": \"11K7NXD655W7R89659K58RE07B\",\n  \"transitionCondition\": {\n    \"intervalMinutes\": 30\n  }\n}")

	req, _ := http.NewRequest("PUT", url, payload)

	req.Header.Add("Authorization", "<apiKey>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(res)
	fmt.Println(string(body))

}
```

```ruby
require 'uri'
require 'net/http'

url = URI("https://app.unleash-instance.example.com/api/admin/projects/project/features/featureName/environments/environment/progressions/id")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Put.new(url)
request["Authorization"] = '<apiKey>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"targetMilestone\": \"11K7NXD655W7R89659K58RE07B\",\n  \"transitionCondition\": {\n    \"intervalMinutes\": 30\n  }\n}"

response = http.request(request)
puts response.read_body
```

```java
import com.mashape.unirest.http.HttpResponse;
import com.mashape.unirest.http.Unirest;

HttpResponse<String> response = Unirest.put("https://app.unleash-instance.example.com/api/admin/projects/project/features/featureName/environments/environment/progressions/id")
  .header("Authorization", "<apiKey>")
  .header("Content-Type", "application/json")
  .body("{\n  \"targetMilestone\": \"11K7NXD655W7R89659K58RE07B\",\n  \"transitionCondition\": {\n    \"intervalMinutes\": 30\n  }\n}")
  .asString();
```

```php
<?php
require_once('vendor/autoload.php');

$client = new \GuzzleHttp\Client();

$response = $client->request('PUT', 'https://app.unleash-instance.example.com/api/admin/projects/project/features/featureName/environments/environment/progressions/id', [
  'body' => '{
  "targetMilestone": "11K7NXD655W7R89659K58RE07B",
  "transitionCondition": {
    "intervalMinutes": 30
  }
}',
  'headers' => [
    'Authorization' => '<apiKey>',
    'Content-Type' => 'application/json',
  ],
]);

echo $response->getBody();
```

```csharp
using RestSharp;

var client = new RestClient("https://app.unleash-instance.example.com/api/admin/projects/project/features/featureName/environments/environment/progressions/id");
var request = new RestRequest(Method.PUT);
request.AddHeader("Authorization", "<apiKey>");
request.AddHeader("Content-Type", "application/json");
request.AddParameter("application/json", "{\n  \"targetMilestone\": \"11K7NXD655W7R89659K58RE07B\",\n  \"transitionCondition\": {\n    \"intervalMinutes\": 30\n  }\n}", ParameterType.RequestBody);
IRestResponse response = client.Execute(request);
```

```swift
import Foundation

let headers = [
  "Authorization": "<apiKey>",
  "Content-Type": "application/json"
]
let parameters = [
  "targetMilestone": "11K7NXD655W7R89659K58RE07B",
  "transitionCondition": ["intervalMinutes": 30]
] as [String : Any]

let postData = JSONSerialization.data(withJSONObject: parameters, options: [])

let request = NSMutableURLRequest(url: NSURL(string: "https://app.unleash-instance.example.com/api/admin/projects/project/features/featureName/environments/environment/progressions/id")! as URL,
                                        cachePolicy: .useProtocolCachePolicy,
                                    timeoutInterval: 10.0)
request.httpMethod = "PUT"
request.allHTTPHeaderFields = headers
request.httpBody = postData as Data

let session = URLSession.shared
let dataTask = session.dataTask(with: request as URLRequest, completionHandler: { (data, response, error) -> Void in
  if (error != nil) {
    print(error as Any)
  } else {
    let httpResponse = response as? HTTPURLResponse
    print(httpResponse)
  }
})

dataTask.resume()
```