use jax.nnx for native module

ivy/functional/backends/jax/module.py

@@ -2,7 +2,7 @@
 from __future__ import annotations
 import re
 import jax
-from flax import linen as nn
+from flax import nnx as nn
 import jax.tree_util as tree
 import jax.numpy as jnp
 import functools
@@ -1012,16 +1012,14 @@ def __call__(
         buffers=None,
         **kwargs,
     ):
-        ret = self.apply(v=v, *args, method=self.__class__._forward, **kwargs)
+        ret = self._call(v=v, *args, **kwargs)
         return ret
 
     def __getattr__(self, name):
         if name == "v":
             if not super().__getattribute__("_v") and not getattr(  # noqa: E501
                 self, "_built", False
             ):
-                print("self._kwargs", self._kwargs)
-                print("_build_and_return_v")
                 return self._build_and_return_v(
                     *self._args, dynamic_backend=self._dynamic_backend, **self._kwargs
                 )
@@ -1153,9 +1151,6 @@ def _find_variables(
                 return lambda: getattr(obj, fn)(
                     *obj._args, dynamic_backend=self._dynamic_backend, **obj._kwargs
                 )
-            print(type(obj))
-            print(obj)
-            print(obj._kwargs)
             return getattr(obj, fn)(
                 *obj._args, dynamic_backend=obj._dynamic_backend, **obj._kwargs
             )
@@ -1285,29 +1280,14 @@ def _fn_with_var_arg(self, fn, v_fn, /, keychain_mappings, orig_key_chain):
         return _fn_with_var_arg_wrapper
 
     def _call(self, *args, v=None, buffers=None, **kwargs):
-        if not self._built or not self.built:
-            if not self._built:
-                first_arr = self._get_first_array(*args, **kwargs)
-                self.build(
-                    *args,
-                    **kwargs,
-                    from_call=True,
-                    dtype=first_arr.dtype if first_arr is not None else tf.float32,
-                )
-
-            if not self.built:
-                # Don't use `keras` build method
-                if os.environ.get("USE_KERAS_BUILD", "False").lower() == "false":
-                    self.inputs = tf.nest.flatten(args)
-                else:
-                    input_shapes = self._get_input_shapes(*args)
-                    if len(input_shapes) == 0:
-                        input_shapes = tf.TensorShape(None)
-                    elif len(input_shapes) == 1:
-                        input_shapes = input_shapes[0]
-
-                super(Model, self).build(tf.TensorShape(None))  # noqa: UP008
-
+        if not self._built:
+            first_arr = self._get_first_array(*args, **kwargs)
+            self.build(
+                *args,
+                **kwargs,
+                from_call=True,
+                dtype=first_arr.dtype if first_arr is not None else tf.float32,
+            )
         # If `v` was provided, replace with the module's v
         replace_v = False
         if v is not None:
@@ -1331,7 +1311,7 @@ def _call(self, *args, v=None, buffers=None, **kwargs):
             return ret
         elif hasattr(self.__call__, "wrapped"):
             return self.__call__(*args, **kwargs)
-        return super(Model, self).__call__(*args, **kwargs)  # noqa: UP008
+        return self.forward(*args, **kwargs)  # noqa: UP008
 
     def __delattr__(self, name):
         if hasattr(self, name):