diff --git a/src/drf_yasg/inspectors/field.py b/src/drf_yasg/inspectors/field.py
index ed77d3e..7ada538 100644
--- a/src/drf_yasg/inspectors/field.py
+++ b/src/drf_yasg/inspectors/field.py
@@ -211,7 +211,14 @@ def find_regex(regex_field):
             regex_validator = validator
 
     # regex_validator.regex should be a compiled re object...
-    return getattr(getattr(regex_validator, 'regex', None), 'pattern', None)
+    pattern = getattr(getattr(regex_validator, 'regex', None), 'pattern', None)
+    if pattern:
+        # attempt some basic cleanup to remove regex constructs not supported by JavaScript
+        #  -- swagger uses javascript-style regexes - see https://github.com/swagger-api/swagger-editor/issues/1601
+        if pattern.endswith('\\Z') or pattern.endswith('\\z'):
+            pattern = pattern[:-2] + '$'
+
+    return pattern
 
 
 numeric_fields = (serializers.IntegerField, serializers.FloatField, serializers.DecimalField)
diff --git a/src/drf_yasg/inspectors/view.py b/src/drf_yasg/inspectors/view.py
index ff3c6fd..97eb44f 100644
--- a/src/drf_yasg/inspectors/view.py
+++ b/src/drf_yasg/inspectors/view.py
@@ -162,9 +162,7 @@ class SwaggerAutoSchema(ViewInspector):
 
         default_status = guess_response_status(method)
         default_schema = ''
-        if method == 'post':
-            default_schema = self.get_request_serializer() or self.get_view_serializer()
-        elif method in ('get', 'put', 'patch'):
+        if method in ('get', 'post', 'put', 'patch'):
             default_schema = self.get_request_serializer() or self.get_view_serializer()
 
         default_schema = default_schema or ''
diff --git a/tests/reference.yaml b/tests/reference.yaml
index 1145ff4..f41b519 100644
--- a/tests/reference.yaml
+++ b/tests/reference.yaml
@@ -1108,7 +1108,7 @@ definitions:
         items:
           type: string
           format: slug
-          pattern: ^[-a-zA-Z0-9_]+\Z
+          pattern: ^[-a-zA-Z0-9_]+$
           readOnly: true
         readOnly: true
         uniqueItems: true