# Conditional OpenAPI { #conditional-openapi }

If you needed to, you could use settings and environment variables to configure OpenAPI conditionally depending on the environment, and even disable it entirely.

## About security, APIs, and docs { #about-security-apis-and-docs }

Hiding your documentation user interfaces in production *shouldn't* be the way to protect your API.

			}
		} else if strings.HasPrefix(policy.Key, "$x-amz-meta-") || strings.HasPrefix(policy.Key, "$x-amz-") {
			// This covers all conditions X-Amz-Meta-* and X-Amz-*
			// Check if policy condition is satisfied
			if !checkPolicyCond(op, formValues.Get(formCanonicalName), policy.Value) {

    redirect_maps:
      deployment/deta.md: deployment/cloud.md
      advanced/graphql.md: how-to/graphql.md
      advanced/custom-request-and-route.md: how-to/custom-request-and-route.md
      advanced/conditional-openapi.md: how-to/conditional-openapi.md
      advanced/extending-openapi.md: how-to/extending-openapi.md
      advanced/testing-database.md: how-to/testing-database.md
  mkdocstrings:
    handlers:
      python:
        options:

        assertTrue(testRule.match(responseData)); // Always matches when set to true

        // Both should inherit same property behavior
        conditionalRule.setRuleId("conditional");
        testRule.setRuleId("test");

        assertEquals("conditional", conditionalRule.getRuleId());
        assertEquals("test", testRule.getRuleId());
    }

    /**
     * Test protected field access
     */

        assertTrue(CrawlerStatus.INITIALIZING.ordinal() < CrawlerStatus.RUNNING.ordinal());
        assertTrue(CrawlerStatus.RUNNING.ordinal() < CrawlerStatus.DONE.ordinal());
    }

    /**
     * Test usage in conditional statements
     */
    public void test_conditionalStatements() {
        CrawlerStatus status = CrawlerStatus.RUNNING;

        // Test with if-else
        if (status == CrawlerStatus.INITIALIZING) {

            return ruleId;
        }

        @Override
        public ResponseProcessor getResponseProcessor() {
            return responseProcessor;
        }
    }

    /**
     * Conditional test rule that matches based on URL pattern
     */
    public static class UrlPatternRule implements Rule {
        private static final long serialVersionUID = 1L;
        private final String ruleId;

		}
		if err != nil && !isErrVersionNotFound(err) && !isErrObjectNotFound(err) && !isErrReadQuorum(err) {
			return nil, err
		}

		// if object doesn't exist and not a replication request return error for If-Match conditional requests
		// If-None-Match should be allowed to proceed for non-existent objects
		if err != nil && !opts.ReplicationRequest && opts.HasIfMatch && (isErrObjectNotFound(err) || isErrVersionNotFound(err)) {
			return nil, err

=== ":material-language-kotlin: Kotlin"
    ```kotlin
      private val client: OkHttpClient = OkHttpClient.Builder()
          .cache(Cache(
              directory = cacheDirectory,

		if err != nil && !isErrVersionNotFound(err) && !isErrObjectNotFound(err) && !isErrReadQuorum(err) {
			return objInfo, err
		}

		// if object doesn't exist and not a replication request return error for If-Match conditional requests
		// If-None-Match should be allowed to proceed for non-existent objects
		if err != nil && !opts.ReplicationRequest && opts.HasIfMatch && (isErrObjectNotFound(err) || isErrVersionNotFound(err)) {

* Allow disabling docs UIs by just disabling OpenAPI with `openapi_url=None`. New example in docs: [Advanced: Conditional OpenAPI](https://fastapi.tiangolo.com/advanced/conditional-openapi/). PR [#1421](https://github.com/tiangolo/fastapi/pull/1421).