# Validate constraint

POST https://app.unleash-instance.example.com/api/admin/constraints/validate
Content-Type: application/json

Validates a constraint definition. Checks whether the context field exists and whether the applied configuration is valid. Additional properties are not allowed on data objects that you send to this endpoint.

Reference: https://docs.getunleash.io/api/validate-constraint

## OpenAPI Specification

```yaml
openapi: 3.1.1
info:
  title: Validate constraint
  version: endpoint_features.validateConstraint
paths:
  /api/admin/constraints/validate:
    post:
      operationId: validate-constraint
      summary: Validate constraint
      description: >-
        Validates a constraint definition. Checks whether the context field
        exists and whether the applied configuration is valid. Additional
        properties are not allowed on data objects that you send to this
        endpoint.
      tags:
        - - subpackage_features
      parameters:
        - name: Authorization
          in: header
          description: Header authentication of the form `undefined <token>`
          required: true
          schema:
            type: string
      responses:
        '204':
          description: The constraint is valid
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Features_validateConstraint_Response_204'
        '400':
          description: The request data does not match what we expect.
          content: {}
        '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: {}
        '415':
          description: >-
            The operation does not support request payloads of the provided
            type. Please ensure that you're using one of the listed payload
            types and that you have specified the right content type in the
            "content-type" header.
          content: {}
      requestBody:
        description: constraintSchema
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/constraintSchema'
components:
  schemas:
    ConstraintSchemaOperator:
      type: string
      enum:
        - value: NOT_IN
        - value: IN
        - value: STR_ENDS_WITH
        - value: STR_STARTS_WITH
        - value: STR_CONTAINS
        - value: NUM_EQ
        - value: NUM_GT
        - value: NUM_GTE
        - value: NUM_LT
        - value: NUM_LTE
        - value: DATE_AFTER
        - value: DATE_BEFORE
        - value: SEMVER_EQ
        - value: SEMVER_GT
        - value: SEMVER_LT
    constraintSchema:
      type: object
      properties:
        contextName:
          type: string
          description: The name of the context field that this constraint should apply to.
        operator:
          $ref: '#/components/schemas/ConstraintSchemaOperator'
          description: >-
            The operator to use when evaluating this constraint. For more
            information about the various operators, refer to [the strategy
            constraint operator
            documentation](https://docs.getunleash.io/concepts/activation-strategies#constraint-operators).
        caseInsensitive:
          type: boolean
          default: false
          description: >-
            Whether the operator should be case sensitive or not. Defaults to
            `false` (being case sensitive).
        inverted:
          type: boolean
          default: false
          description: >-
            Whether the result should be negated or not. If `true`, will turn a
            `true` result into a `false` result and vice versa.
        values:
          type: array
          items:
            type: string
          description: >-
            The context values that should be used for constraint evaluation.
            Use this property instead of `value` for properties that accept
            multiple values.
        value:
          type: string
          description: >-
            The context value that should be used for constraint evaluation. Use
            this property instead of `values` for properties that only accept
            single values.
      required:
        - contextName
        - operator
    Features_validateConstraint_Response_204:
      type: object
      properties: {}

```

## SDK Code Examples

```python
import requests

url = "https://app.unleash-instance.example.com/api/admin/constraints/validate"

payload = {
    "contextName": "appName",
    "operator": "IN"
}
headers = {
    "Authorization": "<apiKey>",
    "Content-Type": "application/json"
}

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

print(response.json())
```

```javascript
const url = 'https://app.unleash-instance.example.com/api/admin/constraints/validate';
const options = {
  method: 'POST',
  headers: {Authorization: '<apiKey>', 'Content-Type': 'application/json'},
  body: '{"contextName":"appName","operator":"IN"}'
};

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/constraints/validate"

	payload := strings.NewReader("{\n  \"contextName\": \"appName\",\n  \"operator\": \"IN\"\n}")

	req, _ := http.NewRequest("POST", 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/constraints/validate")

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

request = Net::HTTP::Post.new(url)
request["Authorization"] = '<apiKey>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"contextName\": \"appName\",\n  \"operator\": \"IN\"\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.post("https://app.unleash-instance.example.com/api/admin/constraints/validate")
  .header("Authorization", "<apiKey>")
  .header("Content-Type", "application/json")
  .body("{\n  \"contextName\": \"appName\",\n  \"operator\": \"IN\"\n}")
  .asString();
```

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

$client = new \GuzzleHttp\Client();

$response = $client->request('POST', 'https://app.unleash-instance.example.com/api/admin/constraints/validate', [
  'body' => '{
  "contextName": "appName",
  "operator": "IN"
}',
  '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/constraints/validate");
var request = new RestRequest(Method.POST);
request.AddHeader("Authorization", "<apiKey>");
request.AddHeader("Content-Type", "application/json");
request.AddParameter("application/json", "{\n  \"contextName\": \"appName\",\n  \"operator\": \"IN\"\n}", ParameterType.RequestBody);
IRestResponse response = client.Execute(request);
```

```swift
import Foundation

let headers = [
  "Authorization": "<apiKey>",
  "Content-Type": "application/json"
]
let parameters = [
  "contextName": "appName",
  "operator": "IN"
] as [String : Any]

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

let request = NSMutableURLRequest(url: NSURL(string: "https://app.unleash-instance.example.com/api/admin/constraints/validate")! as URL,
                                        cachePolicy: .useProtocolCachePolicy,
                                    timeoutInterval: 10.0)
request.httpMethod = "POST"
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()
```