Ignore init=False attributes while inspecting fields order (PY-30880)

python/src/com/jetbrains/python/inspections/PyDataclassInspection.kt

@@ -17,6 +17,7 @@ import com.jetbrains.python.psi.impl.PyCallExpressionHelper
 import com.jetbrains.python.psi.impl.PyEvaluator
 import com.jetbrains.python.psi.impl.stubs.PyDataclassFieldStubImpl
 import com.jetbrains.python.psi.resolve.PyResolveContext
+import com.jetbrains.python.psi.stubs.PyDataclassFieldStub
 import com.jetbrains.python.psi.types.*
 
 class PyDataclassInspection : PyInspection() {
@@ -102,7 +103,12 @@ class PyDataclassInspection : PyInspection() {
           PyNamedTupleInspection.inspectFieldsOrder(
             node,
             this::registerProblem,
-            { !PyTypingTypeProvider.isClassVar(it, myTypeEvalContext) },
+            {
+              val stub = it.stub
+              val fieldStub = if (stub == null) PyDataclassFieldStubImpl.create(it) else stub.getCustomStub(PyDataclassFieldStub::class.java)
+
+              fieldStub?.initValue() != false && !PyTypingTypeProvider.isClassVar(it, myTypeEvalContext)
+            },
             {
               val fieldStub = PyDataclassFieldStubImpl.create(it)
 

python/testData/inspections/PyDataclassInspection/attrsFieldsOrder.py

@@ -59,4 +59,10 @@ class D1:
 @attr.dataclass
 class D2:
     x: int = attr.ib(default=attr.NOTHING)
-    y: int
+    y: int
+
+
+@attr.dataclass
+class E1:
+    x: int = 0
+    y: int = attr.ib(init=False)

python/testData/inspections/PyDataclassInspection/fieldsOrder.py

@@ -76,4 +76,10 @@ class C3:
     x: int = dataclasses.field(default_factory=dataclasses.MISSING)
     y: int
 
-C3(1, 2)
+C3(1, 2)
+
+
+@dataclasses.dataclass
+class D1:
+    x: int = 0
+    y: int = dataclasses.field(init=False)