Sergey Vanyushkin
ca4e8877a5
- Add AI code generation requirements to AGENTS.md - Add module-level docstrings to all 46 Python modules - Add detailed Google-style docstrings to all classes and functions - Remove all inline comments following self-documenting code principle - Include Args, Returns, Raises sections in function docstrings - Add Attributes and Examples sections to class docstrings
51 lines
1.5 KiB
Python
51 lines
1.5 KiB
Python
"""Title value object.
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This module defines the Title value object for blog post titles
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with validation for minimum and maximum length constraints.
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"""
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from dataclasses import dataclass
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from app.domain.value_objects.base import ValueObject
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@dataclass(frozen=True, slots=True)
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class Title(ValueObject[str]):
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"""Blog post title value object.
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Wraps and validates blog post titles ensuring they meet length
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requirements and are not empty.
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Attributes:
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value: The title string value.
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MIN_LENGTH: Minimum allowed title length (3 characters).
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MAX_LENGTH: Maximum allowed title length (200 characters).
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Raises:
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ValueError: If title is empty, too short, or too long.
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Example:
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>>> title = Title("My Blog Post")
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>>> print(title.value)
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"""
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MIN_LENGTH: int = 3
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MAX_LENGTH: int = 200
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def _validate(self) -> None:
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"""Validate title string.
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Checks that title is a non-empty string within length bounds.
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Raises:
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ValueError: If title fails validation criteria.
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"""
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if not isinstance(self.value, str):
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raise ValueError("Title must be a string")
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if len(self.value) < self.MIN_LENGTH:
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raise ValueError(f"Title must be at least {self.MIN_LENGTH} characters")
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if len(self.value) > self.MAX_LENGTH:
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raise ValueError(f"Title must be at most {self.MAX_LENGTH} characters")
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if not self.value.strip():
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raise ValueError("Title cannot be empty or whitespace")
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