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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.
86 lines
3.3 KiB
Python
86 lines
3.3 KiB
Python
from typing import Union
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from pydantic import BaseModel, ConfigDict, Field
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from invokeai.app.invocations.baseinvocation import (
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BaseInvocation,
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BaseInvocationOutput,
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FieldDescriptions,
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Input,
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InputField,
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InvocationContext,
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OutputField,
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UIType,
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invocation,
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invocation_output,
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)
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from invokeai.app.invocations.controlnet_image_processors import CONTROLNET_RESIZE_VALUES
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from invokeai.app.invocations.primitives import ImageField
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from invokeai.backend.model_management.models.base import BaseModelType
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class T2IAdapterModelField(BaseModel):
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model_name: str = Field(description="Name of the T2I-Adapter model")
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base_model: BaseModelType = Field(description="Base model")
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model_config = ConfigDict(protected_namespaces=())
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class T2IAdapterField(BaseModel):
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image: ImageField = Field(description="The T2I-Adapter image prompt.")
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t2i_adapter_model: T2IAdapterModelField = Field(description="The T2I-Adapter model to use.")
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weight: Union[float, list[float]] = Field(default=1, description="The weight given to the T2I-Adapter")
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begin_step_percent: float = Field(
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default=0, ge=0, le=1, description="When the T2I-Adapter is first applied (% of total steps)"
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)
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end_step_percent: float = Field(
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default=1, ge=0, le=1, description="When the T2I-Adapter is last applied (% of total steps)"
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)
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resize_mode: CONTROLNET_RESIZE_VALUES = Field(default="just_resize", description="The resize mode to use")
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@invocation_output("t2i_adapter_output")
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class T2IAdapterOutput(BaseInvocationOutput):
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t2i_adapter: T2IAdapterField = OutputField(description=FieldDescriptions.t2i_adapter, title="T2I Adapter")
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@invocation(
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"t2i_adapter", title="T2I-Adapter", tags=["t2i_adapter", "control"], category="t2i_adapter", version="1.0.0"
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)
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class T2IAdapterInvocation(BaseInvocation):
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"""Collects T2I-Adapter info to pass to other nodes."""
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# Inputs
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image: ImageField = InputField(description="The IP-Adapter image prompt.")
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t2i_adapter_model: T2IAdapterModelField = InputField(
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description="The T2I-Adapter model.",
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title="T2I-Adapter Model",
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input=Input.Direct,
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ui_order=-1,
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)
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weight: Union[float, list[float]] = InputField(
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default=1, ge=0, description="The weight given to the T2I-Adapter", ui_type=UIType.Float, title="Weight"
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)
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begin_step_percent: float = InputField(
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default=0, ge=-1, le=2, description="When the T2I-Adapter is first applied (% of total steps)"
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)
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end_step_percent: float = InputField(
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default=1, ge=0, le=1, description="When the T2I-Adapter is last applied (% of total steps)"
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)
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resize_mode: CONTROLNET_RESIZE_VALUES = InputField(
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default="just_resize",
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description="The resize mode applied to the T2I-Adapter input image so that it matches the target output size.",
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)
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def invoke(self, context: InvocationContext) -> T2IAdapterOutput:
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return T2IAdapterOutput(
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t2i_adapter=T2IAdapterField(
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image=self.image,
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t2i_adapter_model=self.t2i_adapter_model,
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weight=self.weight,
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begin_step_percent=self.begin_step_percent,
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end_step_percent=self.end_step_percent,
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resize_mode=self.resize_mode,
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)
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)
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