crewAI/docs/fix-issue-2356.md

Fix for Issue #2356: Missing Parentheses in Flow Documentation

Issue

In the "first-flow.mdx" documentation, there's an error in the code example where a task method reference is missing parentheses:

@task
def review_section_task(self) -> Task:
    return Task(
        config=self.tasks_config['review_section_task'],
        context=[self.write_section_task]  # Missing parentheses
    )

This causes an AttributeError when running crewai flow kickoff because the Flow system requires explicit method calls with parentheses.

Error Message

When users follow the documentation and use the code as shown, they encounter this error:

AttributeError: 'function' object has no attribute 'get'

Root Cause

The core issue is that the Flow system in CrewAI requires explicit method calls with parentheses when processing context tasks. This is implemented in the _map_task_variables method in crew_base.py:

if context_list := task_info.get("context"):
    self.tasks_config[task_name]["context"] = [
        tasks[context_task_name]() for context_task_name in context_list
    ]

When users follow the documentation and use context=[self.write_section_task] without parentheses, they get an AttributeError because a function object doesn't have a get attribute.

Fix

The correct code should be:

@task
def review_section_task(self) -> Task:
    return Task(
        config=self.tasks_config['review_section_task'],
        context=[self.write_section_task()]  # Added parentheses
    )

Verification

I've created a minimal reproducible example that demonstrates both the error and the fix. The error occurs because in crew_base.py, the _map_task_variables method explicitly requires method calls with parentheses when processing context tasks.

Documentation Update Needed

The documentation at docs.crewai.com/guides/flows/first-flow needs to be updated to show the correct syntax with parentheses.