fixed PY-10902 PyCharm 3 no __init__ class introspection for django Meta classes

python/src/com/jetbrains/python/inspections/PyClassHasNoInitInspection.java

@@ -2,7 +2,9 @@ package com.jetbrains.python.inspections;
 
 import com.intellij.codeInspection.LocalInspectionToolSession;
 import com.intellij.codeInspection.ProblemsHolder;
+import com.intellij.openapi.util.text.StringUtil;
 import com.intellij.psi.PsiElementVisitor;
+import com.intellij.psi.util.PsiTreeUtil;
 import com.jetbrains.python.PyBundle;
 import com.jetbrains.python.PyNames;
 import com.jetbrains.python.inspections.quickfix.AddMethodQuickFix;
@@ -44,6 +46,11 @@ public class PyClassHasNoInitInspection extends PyInspection {
 
     @Override
     public void visitPyClass(PyClass node) {
+      final PyClass outerClass = PsiTreeUtil.getParentOfType(node, PyClass.class);
+      assert node != null;
+      if (outerClass != null && StringUtil.equalsIgnoreCase("meta", node.getName())) {
+        return;
+      }
       final List<PyClassLikeType> types = node.getAncestorTypes(myTypeEvalContext);
       for (PyClassLikeType type : types) {
         if (type == null) return;

python/testData/inspections/PyClassHasNoInitInspection/meta.py

@@ -0,0 +1,8 @@
+from django.db import models
+class BasePage(models.Model):
+    title = models.CharField(max_length=50)
+    slug = models.CharField(max_length=50)
+
+
+    class Meta:
+            abstract = True

python/testSrc/com/jetbrains/python/inspections/PyClassHasNoInitInspectionTest.java

@@ -31,6 +31,10 @@ public class PyClassHasNoInitInspectionTest extends PyTestCase {
     doTest();
   }
 
+  public void testMeta() {
+    doTest();
+  }
+
   public void testUnresolvedAncestor() {
     doTest();
   }