Address BackendV1 deprecation warning oversights

qiskit/primitives/backend_estimator_v2.py

@@ -15,6 +15,7 @@
 from __future__ import annotations
 
 import math
+import warnings
 from collections import defaultdict
 from collections.abc import Iterable
 from dataclasses import dataclass
@@ -131,12 +132,28 @@ def __init__(
         options: dict | None = None,
     ):
         """
+        .. deprecated:: 1.4
+            The method ``BackendEstimatorV2.__init__`` will stop supporting inputs of type
+            :class:`.BackendV1` in the `backend` parameter in a future release no
+            earlier than 2.0. :class:`.BackendV1` is deprecated and implementations should
+            move to :class:`.BackendV2`.
+
         Args:
             backend: The backend to run the primitive on.
             options: The options to control the default precision (``default_precision``),
                 the operator grouping (``abelian_grouping``), and
                 the random seed for the simulator (``seed_simulator``).
         """
+
+        if not isinstance(backend, BackendV2):
+            warnings.warn(
+                "The method `BackendEstimatorV2.__init__` will stop supporting inputs of "
+                f"type `BackendV1` ( {backend} ) in the `backend` parameter in a future "
+                "release no earlier than 2.0. `BackendV1` is deprecated and implementations "
+                "should move to `BackendV2`.",
+                category=DeprecationWarning,
+                stacklevel=2,
+            )
         self._backend = backend
         self._options = Options(**options) if options else Options()
 

qiskit/primitives/backend_sampler_v2.py

@@ -123,11 +123,26 @@ def __init__(
         options: dict | None = None,
     ):
         """
+        .. deprecated:: 1.4
+            The method ``BackendSamplerV2.__init__`` will stop supporting inputs of type
+            :class:`.BackendV1` in the `backend` parameter in a future release no
+            earlier than 2.0. :class:`.BackendV1` is deprecated and implementations should
+            move to :class:`.BackendV2`.
+
         Args:
             backend: The backend to run the primitive on.
             options: The options to control the default shots (``default_shots``) and
                 the random seed for the simulator (``seed_simulator``).
         """
+        if not isinstance(backend, BackendV2):
+            warnings.warn(
+                "The method `BackendSamplerV2.__init__` will stop supporting inputs of "
+                f"type `BackendV1` ( {backend} ) in the `backend` parameter in a future "
+                "release no earlier than 2.0. `BackendV1` is deprecated and implementations "
+                "should move to `BackendV2`.",
+                category=DeprecationWarning,
+                stacklevel=2,
+            )
         self._backend = backend
         self._options = Options(**options) if options else Options()
 

qiskit/providers/backend_compat.py

@@ -32,12 +32,6 @@
 logger = logging.getLogger(__name__)
 
 
-@deprecate_func(
-    since="1.4",
-    removal_timeline="in the 2.0 release",
-    additional_msg="With the deprecation of `qiskit.providers.models` this utility function "
-    "is not needed.",
-)
 @deprecate_pulse_arg("defaults")
 def convert_to_target(
     configuration: BackendConfiguration,
@@ -66,9 +60,19 @@ def convert_to_target(
     Returns:
         A ``Target`` instance.
     """
-    return _convert_to_target(
-        configuration, properties, defaults, custom_name_mapping, add_delay, filter_faulty
-    )
+    # If a deprecated error is raised during the conversion, we should not return the
+    # deprecation warning to the user,as it is not actionable for them.
+    with warnings.catch_warnings():
+        warnings.filterwarnings(
+            "ignore",
+            category=DeprecationWarning,
+            message=".*``qiskit.providers.exceptions.BackendPropertyError``",
+            module="qiskit",
+        )
+        target = _convert_to_target(
+            configuration, properties, defaults, custom_name_mapping, add_delay, filter_faulty
+        )
+    return target
 
 
 def _convert_to_target(
@@ -323,7 +327,6 @@ def _get_value(prop_dict, prop_name):
 def qubit_props_list_from_props(
     properties: BackendProperties,
 ) -> List[QubitProperties]:
-    # TODO Remove this function with BackendProperties
     """Uses BackendProperties to construct
     and return a list of QubitProperties.
     """
@@ -440,7 +443,16 @@ def target(self):
         :rtype: Target
         """
         if self._target is None:
+            # If a deprecated error is raised during the conversion,
+            # we should not return the deprecation warning to the user,
+            # as it is not actionable for them.
             with warnings.catch_warnings():
+                warnings.filterwarnings(
+                    "ignore",
+                    category=DeprecationWarning,
+                    message=".*``qiskit.providers.exceptions.BackendPropertyError``",
+                    module="qiskit",
+                )
                 # convert_to_target is deprecated along BackendV2Converter
                 # They both need to be removed at the same time
                 warnings.filterwarnings(
@@ -449,7 +461,7 @@ def target(self):
                     message=r".+qiskit\.providers\.backend_compat\.convert_to_target.+",
                     module="qiskit",
                 )
-                self._target = convert_to_target(
+                self._target = _convert_to_target(
                     configuration=self._config,
                     properties=self._properties,
                     defaults=self._defaults,

qiskit/providers/basic_provider/basic_simulator.py

@@ -596,7 +596,6 @@ def _run_job(self, job_id: str, qobj: QasmQobj) -> Result:
             "time_taken": (end - start),
             "header": qobj.header.to_dict(),
         }
-
         return Result.from_dict(result)
 
     @deprecate_func(

qiskit/providers/exceptions.py

@@ -13,6 +13,7 @@
 """Exceptions for errors raised while handling Backends and Jobs."""
 
 from qiskit.exceptions import QiskitError
+from qiskit.utils import deprecate_func
 
 
 class JobError(QiskitError):
@@ -36,10 +37,30 @@ class QiskitBackendNotFoundError(QiskitError):
 class BackendPropertyError(QiskitError):
     """Base class for errors raised while looking for a backend property."""
 
-    pass
+    @deprecate_func(
+        since="1.4",
+        removal_timeline="in the 2.0 release",
+        additional_msg="The models in ``qiskit.providers.models`` and related objects are part "
+        "of the deprecated `BackendV1` workflow,  and no longer necessary for `BackendV2`. If a user "
+        "workflow requires these representations it likely relies on deprecated functionality and "
+        "should be updated to use `BackendV2`.",
+        stacklevel=2,
+    )
+    def __init__(self, *message):
+        super().__init__(*message)
 
 
 class BackendConfigurationError(QiskitError):
     """Base class for errors raised by the BackendConfiguration."""
 
-    pass
+    @deprecate_func(
+        since="1.4",
+        removal_timeline="in the 2.0 release",
+        additional_msg="The models in ``qiskit.providers.models`` and related objects are part "
+        "of the deprecated `BackendV1` workflow,  and no longer necessary for `BackendV2`. If a user "
+        "workflow requires these representations it likely relies on deprecated functionality and "
+        "should be updated to use `BackendV2`.",
+        stacklevel=2,
+    )
+    def __init__(self, *message):
+        super().__init__(*message)

qiskit/providers/models/backendproperties.py

@@ -34,6 +34,15 @@ class Nduv:
         value: value.
     """
 
+    @deprecate_func(
+        since="1.4",
+        removal_timeline="in the 2.0 release",
+        additional_msg="The models in ``qiskit.providers.models`` and related objects are part "
+        "of the deprecated `BackendV1` workflow,  and no longer necessary for `BackendV2`. If a user "
+        "workflow requires these representations it likely relies on deprecated functionality and "
+        "should be updated to use `BackendV2`.",
+        stacklevel=2,
+    )
     def __init__(self, date, name, unit, value):
         """Initialize a new name-date-unit-value object
 
@@ -97,6 +106,15 @@ class GateProperties:
 
     _data = {}
 
+    @deprecate_func(
+        since="1.4",
+        removal_timeline="in the 2.0 release",
+        additional_msg="The models in ``qiskit.providers.models`` and related objects are part "
+        "of the deprecated `BackendV1` workflow,  and no longer necessary for `BackendV2`. If a user "
+        "workflow requires these representations it likely relies on deprecated functionality and "
+        "should be updated to use `BackendV2`.",
+        stacklevel=2,
+    )
     def __init__(self, qubits, gate, parameters, **kwargs):
         """Initialize a new :class:`GateProperties` object
 
@@ -180,7 +198,7 @@ class BackendProperties:
         "of the deprecated `BackendV1` workflow,  and no longer necessary for `BackendV2`. If a user "
         "workflow requires these representations it likely relies on deprecated functionality and "
         "should be updated to use `BackendV2`.",
-        stacklevel=3,
+        stacklevel=2,
     )
     def __init__(
         self, backend_name, backend_version, last_update_date, qubits, gates, general, **kwargs

qiskit/providers/models/backendstatus.py

@@ -14,11 +14,21 @@
 
 import html
 from qiskit.exceptions import QiskitError
+from qiskit.utils import deprecate_func
 
 
 class BackendStatus:
     """Class representing Backend Status."""
 
+    @deprecate_func(
+        since="1.4",
+        removal_timeline="in the 2.0 release",
+        additional_msg="The models in ``qiskit.providers.models`` and related objects are part "
+        "of the deprecated `BackendV1` workflow,  and no longer necessary for `BackendV2`. If a user "
+        "workflow requires these representations it likely relies on deprecated functionality and "
+        "should be updated to use `BackendV2`.",
+        stacklevel=2,
+    )
     def __init__(
         self,
         backend_name: str,

qiskit/providers/models/jobstatus.py

@@ -12,6 +12,8 @@
 
 """Class for job status."""
 
+from qiskit.utils import deprecate_func
+
 
 class JobStatus:
     """Model for JobStatus.
@@ -24,6 +26,15 @@ class JobStatus:
 
     _data = {}
 
+    @deprecate_func(
+        since="1.4",
+        removal_timeline="in the 2.0 release",
+        additional_msg="The models in ``qiskit.providers.models`` and related objects are part "
+        "of the deprecated `BackendV1` workflow,  and no longer necessary for `BackendV2`. If a user "
+        "workflow requires these representations it likely relies on deprecated functionality and "
+        "should be updated to use `BackendV2`.",
+        stacklevel=2,
+    )
     def __init__(self, job_id, status, status_msg, **kwargs):
         self._data = {}
         self.job_id = job_id