Remove model inheritance (#30)

crewai/task.py

@@ -1,14 +1,16 @@
+import uuid
 from typing import Any, List, Optional
 
-from pydantic import Field, model_validator
+from pydantic import UUID4, BaseModel, Field, field_validator, model_validator
+from pydantic_core import PydanticCustomError
 
 from crewai.agent import Agent
-from crewai.base.model import CrewAIBaseModel
 
 
-class Task(CrewAIBaseModel):
+class Task(BaseModel):
     """Class that represent a task to be executed."""
 
+    __hash__ = object.__hash__
     description: str = Field(description="Description of the actual task.")
     agent: Optional[Agent] = Field(
         description="Agent responsible for the task.", default=None
@@ -17,6 +19,19 @@ class Task(CrewAIBaseModel):
         default_factory=list,
         description="Tools the agent are limited to use for this task.",
     )
+    id: UUID4 = Field(
+        default_factory=uuid.uuid4,
+        frozen=True,
+        description="Unique identifier for the object, not set by user.",
+    )
+
+    @field_validator("id", mode="before")
+    @classmethod
+    def _deny_user_set_id(cls, v: Optional[UUID4]) -> None:
+        if v:
+            raise PydanticCustomError(
+                "may_not_set_field", "This field is not to be set by the user.", {}
+            )
 
     @model_validator(mode="after")
     def check_tools(self):