simulation_type default to "tidy3d" always

tidy3d/components/simulation.py

@@ -5,7 +5,7 @@
 import math
 import pathlib
 from abc import ABC, abstractmethod
-from typing import Dict, List, Set, Tuple, Union
+from typing import Dict, List, Optional, Set, Tuple, Union
 
 import autograd.numpy as np
 import matplotlib as mpl
@@ -204,11 +204,13 @@ class AbstractYeeGridSimulation(AbstractSimulation, ABC):
         ", or ``False`` to apply staircasing.",
     )
 
-    simulation_type: Literal["autograd_fwd", "autograd_bwd", None] = pydantic.Field(
-        None,
-        title="Simulation Type",
-        description="Tag used internally to distinguish types of simulations for "
-        "``autograd`` gradient processing.",
+    simulation_type: Optional[Literal["autograd_fwd", "autograd_bwd", "tidy3d", None]] = (
+        pydantic.Field(
+            "tidy3d",
+            title="Simulation Type",
+            description="Tag used internally to distinguish types of simulations for "
+            "``autograd`` gradient processing.",
+        )
     )
 
     post_norm: Union[float, FreqDataArray] = pydantic.Field(
@@ -262,6 +264,13 @@ class AbstractYeeGridSimulation(AbstractSimulation, ABC):
         *  `Dielectric constant assignment on Yee grids <https://www.flexcompute.com/fdtd101/Lecture-9-Dielectric-constant-assignment-on-Yee-grids/>`_
     """
 
+    @pydantic.validator("simulation_type", always=True)
+    def _validate_simulation_type_tidy3d(cls, val):
+        """Enforce the simulation_type is 'tidy3d' if passed as None for bkwrds compatibility."""
+        if val is None:
+            return "tidy3d"
+        return val
+
     @pydantic.validator("lumped_elements", always=True)
     @skip_if_fields_missing(["structures"])
     def _validate_num_lumped_elements(cls, val, values):

tidy3d/plugins/adjoint/web.py

@@ -260,7 +260,7 @@ class AdjointJob(Job):
     """Job that uploads a jax_info object and also includes new fields for adjoint tasks."""
 
     simulation_type: AdjointSimulationType = pd.Field(
-        None,
+        "tidy3d",
         title="Simulation Type",
         description="Type of simulation, used internally only.",
     )

tidy3d/web/core/task_core.py

@@ -225,6 +225,11 @@ def create(
             :class:`SimulationTask` object containing info about status, size,
             credits of task and others.
         """
+
+        # handle backwards compatibility, "tidy3d" is the default simulation_type
+        if simulation_type is None:
+            simulation_type = "tidy3d"
+
         folder = Folder.get(folder_name, create=True)
         resp = http.post(
             f"tidy3d/projects/{folder.folder_id}/tasks",