mirror of
https://github.com/invoke-ai/InvokeAI
synced 2024-08-30 20:32:17 +00:00
c238a7f18b
Upgrade pydantic and fastapi to latest.
- pydantic~=2.4.2
- fastapi~=103.2
- fastapi-events~=0.9.1
**Big Changes**
There are a number of logic changes needed to support pydantic v2. Most changes are very simple, like using the new methods to serialized and deserialize models, but there are a few more complex changes.
**Invocations**
The biggest change relates to invocation creation, instantiation and validation.
Because pydantic v2 moves all validation logic into the rust pydantic-core, we may no longer directly stick our fingers into the validation pie.
Previously, we (ab)used models and fields to allow invocation fields to be optional at instantiation, but required when `invoke()` is called. We directly manipulated the fields and invocation models when calling `invoke()`.
With pydantic v2, this is much more involved. Changes to the python wrapper do not propagate down to the rust validation logic - you have to rebuild the model. This causes problem with concurrent access to the invocation classes and is not a free operation.
This logic has been totally refactored and we do not need to change the model any more. The details are in `baseinvocation.py`, in the `InputField` function and `BaseInvocation.invoke_internal()` method.
In the end, this implementation is cleaner.
**Invocation Fields**
In pydantic v2, you can no longer directly add or remove fields from a model.
Previously, we did this to add the `type` field to invocations.
**Invocation Decorators**
With pydantic v2, we instead use the imperative `create_model()` API to create a new model with the additional field. This is done in `baseinvocation.py` in the `invocation()` wrapper.
A similar technique is used for `invocation_output()`.
**Minor Changes**
There are a number of minor changes around the pydantic v2 models API.
**Protected `model_` Namespace**
All models' pydantic-provided methods and attributes are prefixed with `model_` and this is considered a protected namespace. This causes some conflict, because "model" means something to us, and we have a ton of pydantic models with attributes starting with "model_".
Forunately, there are no direct conflicts. However, in any pydantic model where we define an attribute or method that starts with "model_", we must tell set the protected namespaces to an empty tuple.
```py
class IPAdapterModelField(BaseModel):
model_name: str = Field(description="Name of the IP-Adapter model")
base_model: BaseModelType = Field(description="Base model")
model_config = ConfigDict(protected_namespaces=())
```
**Model Serialization**
Pydantic models no longer have `Model.dict()` or `Model.json()`.
Instead, we use `Model.model_dump()` or `Model.model_dump_json()`.
**Model Deserialization**
Pydantic models no longer have `Model.parse_obj()` or `Model.parse_raw()`, and there are no `parse_raw_as()` or `parse_obj_as()` functions.
Instead, you need to create a `TypeAdapter` object to parse python objects or JSON into a model.
```py
adapter_graph = TypeAdapter(Graph)
deserialized_graph_from_json = adapter_graph.validate_json(graph_json)
deserialized_graph_from_dict = adapter_graph.validate_python(graph_dict)
```
**Field Customisation**
Pydantic `Field`s no longer accept arbitrary args.
Now, you must put all additional arbitrary args in a `json_schema_extra` arg on the field.
**Schema Customisation**
FastAPI and pydantic schema generation now follows the OpenAPI version 3.1 spec.
This necessitates two changes:
- Our schema customization logic has been revised
- Schema parsing to build node templates has been revised
The specific aren't important, but this does present additional surface area for bugs.
**Performance Improvements**
Pydantic v2 is a full rewrite with a rust backend. This offers a substantial performance improvement (pydantic claims 5x to 50x depending on the task). We'll notice this the most during serialization and deserialization of sessions/graphs, which happens very very often - a couple times per node.
I haven't done any benchmarks, but anecdotally, graph execution is much faster. Also, very larges graphs - like with massive iterators - are much, much faster.
44 lines
1.3 KiB
Python
44 lines
1.3 KiB
Python
from typing import Optional
|
|
|
|
from pydantic import Field
|
|
|
|
from invokeai.app.services.image_records.image_records_common import ImageRecord
|
|
from invokeai.app.util.model_exclude_null import BaseModelExcludeNull
|
|
|
|
|
|
class ImageUrlsDTO(BaseModelExcludeNull):
|
|
"""The URLs for an image and its thumbnail."""
|
|
|
|
image_name: str = Field(description="The unique name of the image.")
|
|
"""The unique name of the image."""
|
|
image_url: str = Field(description="The URL of the image.")
|
|
"""The URL of the image."""
|
|
thumbnail_url: str = Field(description="The URL of the image's thumbnail.")
|
|
"""The URL of the image's thumbnail."""
|
|
|
|
|
|
class ImageDTO(ImageRecord, ImageUrlsDTO):
|
|
"""Deserialized image record, enriched for the frontend."""
|
|
|
|
board_id: Optional[str] = Field(
|
|
default=None, description="The id of the board the image belongs to, if one exists."
|
|
)
|
|
"""The id of the board the image belongs to, if one exists."""
|
|
|
|
pass
|
|
|
|
|
|
def image_record_to_dto(
|
|
image_record: ImageRecord,
|
|
image_url: str,
|
|
thumbnail_url: str,
|
|
board_id: Optional[str],
|
|
) -> ImageDTO:
|
|
"""Converts an image record to an image DTO."""
|
|
return ImageDTO(
|
|
**image_record.model_dump(),
|
|
image_url=image_url,
|
|
thumbnail_url=thumbnail_url,
|
|
board_id=board_id,
|
|
)
|