diff --git a/changelog.d/12.added.md b/changelog.d/12.added.md
new file mode 100644
index 0000000..0cebcb3
--- /dev/null
+++ b/changelog.d/12.added.md
@@ -0,0 +1 @@
+Add/fix missing/incorrect field definitions for records
diff --git a/docs/managers/product.md b/docs/managers/product.md
index 0dc38c4..ecdca41 100644
--- a/docs/managers/product.md
+++ b/docs/managers/product.md
@@ -254,6 +254,16 @@ The record class currently implements the following fields and methods.
 For more information on attributes and methods common to all record types,
 see [Record Attributes and Methods](index.md#attributes-and-methods).
 
+### `active`
+
+```python
+active: bool
+```
+
+Whether or not this product is active (enabled).
+
+*Added in version 0.2.0.*
+
 ### `categ_id`
 
 ```python
@@ -311,14 +321,15 @@ and caches it for subsequent accesses.
 ### `default_code`
 
 ```python
-default_code: str
+default_code: str | Literal[False]
 ```
 
-The Default Code for this product.
+The Default Code for this product, if set.
 
 In the OpenStack Integration add-on, this is used to store
 the rated unit for the service product.
 
+*Changed in version 0.2.0*: Made `default_code` optional.
 
 ### `description`
 
@@ -346,7 +357,6 @@ The list price of the product.
 
 This becomes the unit price of the product on invoices.
 
-
 ### `name`
 
 ```python
@@ -355,6 +365,16 @@ name: str
 
 The name of the product.
 
+### `sale_ok`
+
+```python
+sale_ok: bool
+```
+
+Whether or not this product is sellable.
+
+*Added in version 0.2.0.*
+
 ### `uom_id`
 
 ```python
diff --git a/docs/managers/sale-order.md b/docs/managers/sale-order.md
index 7d12bc0..8f8c169 100644
--- a/docs/managers/sale-order.md
+++ b/docs/managers/sale-order.md
@@ -35,6 +35,39 @@ For more information on how to use managers, refer to [Managers](index.md).
 
 The following manager methods are also available, in addition to the standard methods.
 
+### `action_cancel`
+
+```python
+action_cancel(
+    sale_order: int | SaleOrder,
+) -> None
+```
+
+Cancel the given sale order.
+
+```python
+>>> from openstack_odooclient import Client as OdooClient
+>>> odoo_client = OdooClient(
+...     hostname="localhost",
+...     port=8069,
+...     protocol="jsonrpc",
+...     database="odoodb",
+...     user="test-user",
+...     password="<password>",
+... )
+>>> odoo_client.sale_orders.action_cancel(
+...     sale_order=1234,  # ID or object
+... )
+```
+
+*Added in version 0.2.0.*
+
+#### Parameters
+
+| Name         | Type              | Description              | Default    |
+|--------------|-------------------|--------------------------|------------|
+| `sale_order` | `int | SaleOrder` | The sale order to cancel | (required) |
+
 ### `action_confirm`
 
 ```python
@@ -187,6 +220,39 @@ display_name: str
 
 The display name of the sale order.
 
+### `invoice_count`
+
+```python
+invoice_count: int
+```
+
+The number of [invoices (account moves)](account-move.md) generated from the sale order.
+
+*Added in version 0.2.0.*
+
+### `invoice_ids`
+
+```python
+invoice_ids: list[int]
+```
+
+A list of IDs for [invoices (account moves)](account-move.md) generated from the sale order.
+
+*Added in version 0.2.0.*
+
+### `invoices`
+
+```python
+invoices: list[AccountMove]
+```
+
+The [invoices (account moves)](account-move.md) generated from the sale order.
+
+This fetches the full records from Odoo once,
+and caches them for subsequent accesses.
+
+*Added in version 0.2.0.*
+
 ### `invoice_status`
 
 ```python
@@ -337,6 +403,30 @@ Values:
 * ``done`` - Finalised and settled sale order, cannot be modified
 * ``cancel`` - Cancelled sale order, can be deleted in most cases
 
+### `action_cancel`
+
+```python
+action_cancel() -> None
+```
+
+Cancel this sale order.
+
+```python
+>>> from openstack_odooclient import Client as OdooClient
+>>> odoo_client = OdooClient(
+...     hostname="localhost",
+...     port=8069,
+...     protocol="jsonrpc",
+...     database="odoodb",
+...     user="test-user",
+...     password="<password>",
+... )
+>>> sale_order = odoo_client.sale_orders.get(1234)
+>>> sale_order.action_cancel()
+```
+
+*Added in version 0.2.0.*
+
 ### `action_confirm`
 
 ```python
diff --git a/openstack_odooclient/base/record.py b/openstack_odooclient/base/record.py
index b97fa79..8be05c4 100644
--- a/openstack_odooclient/base/record.py
+++ b/openstack_odooclient/base/record.py
@@ -19,7 +19,7 @@
 
 from dataclasses import dataclass
 from datetime import date, datetime
-from types import MappingProxyType
+from types import MappingProxyType, UnionType
 from typing import (
     TYPE_CHECKING,
     Annotated,
@@ -392,7 +392,8 @@ def _getattr_model_ref(
         # The following is for decoding a singular model ref value.
         # Check if the model ref is optional, and if it is,
         # return the desired value for when the value is empty.
-        if get_type_origin(attr_type) is Union:
+        attr_type_origin = get_type_origin(attr_type)
+        if attr_type_origin is Union or attr_type_origin is UnionType:
             unsupported_union = (
                 "Only unions of the format Optional[T], "
                 "Union[T, type(None)] or Union[T, Literal[False]] "
diff --git a/openstack_odooclient/base/record_manager.py b/openstack_odooclient/base/record_manager.py
index b2afded..25b4019 100644
--- a/openstack_odooclient/base/record_manager.py
+++ b/openstack_odooclient/base/record_manager.py
@@ -360,7 +360,7 @@ def get(
         :param optional: Return ``None`` if not found, defaults to ``False``
         :raises RecordNotFoundError: Record with the given ID not found
         :return: List of records
-        :rtype: Record | list[str, Any]
+        :rtype: Record | dict[str, Any]
         """
         try:
             return self.list(
diff --git a/openstack_odooclient/managers/product.py b/openstack_odooclient/managers/product.py
index d57eaae..032c6ed 100644
--- a/openstack_odooclient/managers/product.py
+++ b/openstack_odooclient/managers/product.py
@@ -27,6 +27,12 @@
 
 
 class Product(RecordBase["ProductManager"]):
+    active: bool
+    """Whether or not this product is active (enabled).
+
+    *Added in version 0.2.0.*
+    """
+
     categ_id: Annotated[int, ModelRef("categ_id", ProductCategory)]
     """The ID for the category this product is under."""
 
@@ -53,11 +59,13 @@ class Product(RecordBase["ProductManager"]):
     and caches it for subsequent accesses.
     """
 
-    default_code: str
-    """The Default Code for this product.
+    default_code: str | Literal[False]
+    """The Default Code for this product, if set.
 
     In the OpenStack Integration add-on, this is used to store
     the rated unit for the service product.
+
+    *Changed in version 0.2.0*: Made `default_code` optional.
     """
 
     description: str
@@ -75,6 +83,12 @@ class Product(RecordBase["ProductManager"]):
     name: str
     """The name of the product."""
 
+    sale_ok: bool
+    """Whether or not this product is sellable.
+
+    *Added in version 0.2.0.*
+    """
+
     uom_id: Annotated[int, ModelRef("uom_id", Uom)]
     """The ID for the Unit of Measure for this product."""
 
diff --git a/openstack_odooclient/managers/sale_order.py b/openstack_odooclient/managers/sale_order.py
index a2ee550..15f1830 100644
--- a/openstack_odooclient/managers/sale_order.py
+++ b/openstack_odooclient/managers/sale_order.py
@@ -54,6 +54,30 @@ class SaleOrder(RecordBase["SaleOrderManager"]):
     display_name: str
     """The display name of the sale order."""
 
+    invoice_count: int
+    """The number of invoices generated from the sale order.
+
+    *Added in version 0.2.0.*
+    """
+
+    invoice_ids: Annotated[list[int], ModelRef("invoice_ids", AccountMove)]
+    """A list of IDs for invoices generated from the sale order.
+
+    *Added in version 0.2.0.*
+    """
+
+    invoices: Annotated[
+        list[AccountMove],
+        ModelRef("invoice_ids", AccountMove),
+    ]
+    """The invoices generated from the sale order.
+
+    This fetches the full records from Odoo once,
+    and caches them for subsequent accesses.
+
+    *Added in version 0.2.0.*
+    """
+
     invoice_status: Literal["no", "to invoice", "invoiced", "upselling"]
     """The current invoicing status of this sale order.
 
@@ -145,6 +169,13 @@ class SaleOrder(RecordBase["SaleOrderManager"]):
     * ``cancel`` - Cancelled sale order, can be deleted in most cases
     """
 
+    def action_cancel(self) -> None:
+        """Cancel this sale order.
+
+        *Added in version 0.2.0.*
+        """
+        self._env.action_cancel(self.id)
+
     def action_confirm(self) -> None:
         """Confirm this sale order."""
         self._env.action_confirm(self.id)
@@ -158,6 +189,22 @@ class SaleOrderManager(NamedRecordManagerBase[SaleOrder]):
     env_name = "sale.order"
     record_class = SaleOrder
 
+    def action_cancel(self, sale_order: int | SaleOrder) -> None:
+        """Cancel the given sale order.
+
+        *Added in version 0.2.0.*
+
+        :param sale_order: The sale order to cancel
+        :type sale_order: int | SaleOrder
+        """
+        self._env.action_cancel(
+            (
+                sale_order.id
+                if isinstance(sale_order, SaleOrder)
+                else sale_order
+            ),
+        )
+
     def action_confirm(self, sale_order: int | SaleOrder) -> None:
         """Confirm the given sale order.
 
@@ -188,6 +235,7 @@ def create_invoices(self, sale_order: int | SaleOrder) -> None:
 
 
 # NOTE(callumdickinson): Import here to avoid circular imports.
+from .account_move import AccountMove  # noqa: E402
 from .currency import Currency  # noqa: E402
 from .partner import Partner  # noqa: E402
 from .project import Project  # noqa: E402