Fix Schema limits for ListField and ListSerializer

Fixes #324

src/drf_yasg/inspectors/field.py

@@ -77,9 +77,11 @@ class InlineSerializerInspector(SerializerInspector):
 
         if isinstance(field, (serializers.ListSerializer, serializers.ListField)):
             child_schema = self.probe_field_inspectors(field.child, ChildSwaggerType, use_references)
+            limits = find_limits(field) or {}
             return SwaggerType(
                 type=openapi.TYPE_ARRAY,
                 items=child_schema,
+                **limits
             )
         elif isinstance(field, serializers.Serializer):
             if swagger_object_type != openapi.Schema:

testproj/snippets/serializers.py

@@ -2,7 +2,7 @@ from decimal import Decimal
 
 from django.contrib.auth import get_user_model
 from rest_framework import serializers
-from rest_framework.compat import MinValueValidator
+from rest_framework.compat import MinValueValidator, MaxLengthValidator
 
 from snippets.models import LANGUAGE_CHOICES, STYLE_CHOICES, Snippet
 
@@ -65,11 +65,13 @@ class SnippetSerializer(serializers.Serializer):
     )
     title = serializers.CharField(required=False, allow_blank=True, max_length=100)
     code = serializers.CharField(style={'base_template': 'textarea.html'})
+    tags = serializers.ListField(child=serializers.CharField(min_length=2), min_length=3, max_length=15)
     linenos = serializers.BooleanField(required=False)
     language = LanguageSerializer(help_text="Sample help text for language")
     styles = serializers.MultipleChoiceField(choices=STYLE_CHOICES, default=['friendly'])
     lines = serializers.ListField(child=serializers.IntegerField(), allow_empty=True, allow_null=True, required=False)
-    example_projects = serializers.ListSerializer(child=ExampleProjectSerializer(), read_only=True)
+    example_projects = serializers.ListSerializer(child=ExampleProjectSerializer(), read_only=True,
+                                                  validators=[MaxLengthValidator(100)])
     difficulty_factor = serializers.FloatField(help_text="this is here just to test FloatField",
                                                read_only=True, default=lambda: 6.9)
     rate_as_string = serializers.DecimalField(max_digits=6, decimal_places=3, default=Decimal('0.0'),

tests/reference.yaml

@@ -1023,6 +1023,7 @@ definitions:
   Snippet:
     required:
       - code
+      - tags
       - language
     type: object
     properties:
@@ -1057,6 +1058,13 @@ definitions:
         title: Code
         type: string
         minLength: 1
+      tags:
+        type: array
+        items:
+          type: string
+          minLength: 2
+        maxItems: 15
+        minItems: 3
       linenos:
         title: Linenos
         type: boolean
@@ -1553,6 +1561,7 @@ definitions:
         items:
           $ref: '#/definitions/Project'
         readOnly: true
+        maxItems: 100
       difficultyFactor:
         title: Difficulty factor
         description: this is here just to test FloatField