Ensure index is not already covered in SQLAlchemy

postgresqlsqlalchemyalembicmigrations
Ensure that individual column indexes in SQLAlchemy are not covered by existing composite indexes.
Bad:
```python
class User(Base):
    __tablename__ = "users"
    __table_args__ = (

Install this rule for wispbit

Add this rule to wispbit and it will run when you open a pull request

Install this rule for Coderabbit

Copy the configuration below and add it to your repository as .coderabbit.yml in your project root.

reviews:
  path_instructions:
    - path: "*.py"
      instructions: |
                
        Ensure that individual column indexes in SQLAlchemy are not covered by existing composite indexes.
        
        Bad:
        
        ```python
        class User(Base):
            __tablename__ = "users"
        
            __table_args__ = (
                Index("email_username_idx", "email", "username"),
            )
        
            id: Mapped[int] = mapped_column(primary_key=True)
            email: Mapped[str] = mapped_column(String(255), index=True)  # covered by email_username_idx
            username: Mapped[str] = mapped_column(String(100))
            status: Mapped[str] = mapped_column(String(20))
        ```
        
        Good:
        
        ```python
        class User(Base):
            __tablename__ = "users"
        
            # Only composite index needed - covers both email and email+username queries
            __table_args__ = (
                Index("email_username_idx", "email", "username"),
            )
        
            id: Mapped[int] = mapped_column(primary_key=True)
            email: Mapped[str] = mapped_column(String(255))
            username: Mapped[str] = mapped_column(String(100))
            status: Mapped[str] = mapped_column(String(20))
        ```

Install this rule for Greptile

Greptile rules can be added through the web interface. Please see this documentation for details on how to add custom rules and context.

Ensure that individual column indexes in SQLAlchemy are not covered by existing composite indexes.
Bad:
```python
class User(Base):
    __tablename__ = "users"
    __table_args__ = (
        Index("email_username_idx", "email", "username"),
    )
    id: Mapped[int] = mapped_column(primary_key=True)
    email: Mapped[str] = mapped_column(String(255), index=True)  # covered by email_username_idx
    username: Mapped[str] = mapped_column(String(100))
    status: Mapped[str] = mapped_column(String(20))
```
Good:
```python
class User(Base):
    __tablename__ = "users"
    # Only composite index needed - covers both email and email+username queries
    __table_args__ = (
        Index("email_username_idx", "email", "username"),
    )
    id: Mapped[int] = mapped_column(primary_key=True)
    email: Mapped[str] = mapped_column(String(255))
    username: Mapped[str] = mapped_column(String(100))
    status: Mapped[str] = mapped_column(String(20))
```

File Path Patterns:

*.py

Install this rule for GitHub Copilot

Copilot instructions can be added through the interface. See the documentation for details on how to create coding guidelines.

Ensure that individual column indexes in SQLAlchemy are not covered by existing composite indexes.
Bad:
```python
class User(Base):
    __tablename__ = "users"
    __table_args__ = (
        Index("email_username_idx", "email", "username"),
    )
    id: Mapped[int] = mapped_column(primary_key=True)
    email: Mapped[str] = mapped_column(String(255), index=True)  # covered by email_username_idx
    username: Mapped[str] = mapped_column(String(100))
    status: Mapped[str] = mapped_column(String(20))
```
Good:
```python
class User(Base):
    __tablename__ = "users"
    # Only composite index needed - covers both email and email+username queries
    __table_args__ = (
        Index("email_username_idx", "email", "username"),
    )
    id: Mapped[int] = mapped_column(primary_key=True)
    email: Mapped[str] = mapped_column(String(255))
    username: Mapped[str] = mapped_column(String(100))
    status: Mapped[str] = mapped_column(String(20))
```

File Path Patterns:

*.py

Install this rule for Graphite Diamond

Diamond custom rules can be added through the interface. See the documentation for details on how to create custom rules.

Ensure that individual column indexes in SQLAlchemy are not covered by existing composite indexes.
Bad:
```python
class User(Base):
    __tablename__ = "users"
    __table_args__ = (
        Index("email_username_idx", "email", "username"),
    )
    id: Mapped[int] = mapped_column(primary_key=True)
    email: Mapped[str] = mapped_column(String(255), index=True)  # covered by email_username_idx
    username: Mapped[str] = mapped_column(String(100))
    status: Mapped[str] = mapped_column(String(20))
```
Good:
```python
class User(Base):
    __tablename__ = "users"
    # Only composite index needed - covers both email and email+username queries
    __table_args__ = (
        Index("email_username_idx", "email", "username"),
    )
    id: Mapped[int] = mapped_column(primary_key=True)
    email: Mapped[str] = mapped_column(String(255))
    username: Mapped[str] = mapped_column(String(100))
    status: Mapped[str] = mapped_column(String(20))
```

File Path Patterns:

*.py

Use with Cline

Copy the rule below and ask Cline to review your code using this rule

Ensure that individual column indexes in SQLAlchemy are not covered by existing composite indexes.
Bad:
```python
class User(Base):
    __tablename__ = "users"
    __table_args__ = (
        Index("email_username_idx", "email", "username"),
    )
    id: Mapped[int] = mapped_column(primary_key=True)
    email: Mapped[str] = mapped_column(String(255), index=True)  # covered by email_username_idx
    username: Mapped[str] = mapped_column(String(100))
    status: Mapped[str] = mapped_column(String(20))
```
Good:
```python
class User(Base):
    __tablename__ = "users"
    # Only composite index needed - covers both email and email+username queries
    __table_args__ = (
        Index("email_username_idx", "email", "username"),
    )
    id: Mapped[int] = mapped_column(primary_key=True)
    email: Mapped[str] = mapped_column(String(255))
    username: Mapped[str] = mapped_column(String(100))
    status: Mapped[str] = mapped_column(String(20))
```

Use with OpenAI Codex

Copy the rule below and ask OpenAI Codex to review your code using this rule

Ensure that individual column indexes in SQLAlchemy are not covered by existing composite indexes.
Bad:
```python
class User(Base):
    __tablename__ = "users"
    __table_args__ = (
        Index("email_username_idx", "email", "username"),
    )
    id: Mapped[int] = mapped_column(primary_key=True)
    email: Mapped[str] = mapped_column(String(255), index=True)  # covered by email_username_idx
    username: Mapped[str] = mapped_column(String(100))
    status: Mapped[str] = mapped_column(String(20))
```
Good:
```python
class User(Base):
    __tablename__ = "users"
    # Only composite index needed - covers both email and email+username queries
    __table_args__ = (
        Index("email_username_idx", "email", "username"),
    )
    id: Mapped[int] = mapped_column(primary_key=True)
    email: Mapped[str] = mapped_column(String(255))
    username: Mapped[str] = mapped_column(String(100))
    status: Mapped[str] = mapped_column(String(20))
```

Use with Cursor

Copy the rule below and ask Cursor to review your code using this rule

Ensure that individual column indexes in SQLAlchemy are not covered by existing composite indexes.
Bad:
```python
class User(Base):
    __tablename__ = "users"
    __table_args__ = (
        Index("email_username_idx", "email", "username"),
    )
    id: Mapped[int] = mapped_column(primary_key=True)
    email: Mapped[str] = mapped_column(String(255), index=True)  # covered by email_username_idx
    username: Mapped[str] = mapped_column(String(100))
    status: Mapped[str] = mapped_column(String(20))
```
Good:
```python
class User(Base):
    __tablename__ = "users"
    # Only composite index needed - covers both email and email+username queries
    __table_args__ = (
        Index("email_username_idx", "email", "username"),
    )
    id: Mapped[int] = mapped_column(primary_key=True)
    email: Mapped[str] = mapped_column(String(255))
    username: Mapped[str] = mapped_column(String(100))
    status: Mapped[str] = mapped_column(String(20))
```

Use with Claude Code

Copy the rule below and ask Claude Code to review your code using this rule

Ensure that individual column indexes in SQLAlchemy are not covered by existing composite indexes.
Bad:
```python
class User(Base):
    __tablename__ = "users"
    __table_args__ = (
        Index("email_username_idx", "email", "username"),
    )
    id: Mapped[int] = mapped_column(primary_key=True)
    email: Mapped[str] = mapped_column(String(255), index=True)  # covered by email_username_idx
    username: Mapped[str] = mapped_column(String(100))
    status: Mapped[str] = mapped_column(String(20))
```
Good:
```python
class User(Base):
    __tablename__ = "users"
    # Only composite index needed - covers both email and email+username queries
    __table_args__ = (
        Index("email_username_idx", "email", "username"),
    )
    id: Mapped[int] = mapped_column(primary_key=True)
    email: Mapped[str] = mapped_column(String(255))
    username: Mapped[str] = mapped_column(String(100))
    status: Mapped[str] = mapped_column(String(20))
```

Install this rule for Windsurf

To set up rules for Windsurf Reviews, please see this documentation 

Ensure that individual column indexes in SQLAlchemy are not covered by existing composite indexes.
Bad:
```python
class User(Base):
    __tablename__ = "users"
    __table_args__ = (
        Index("email_username_idx", "email", "username"),
    )
    id: Mapped[int] = mapped_column(primary_key=True)
    email: Mapped[str] = mapped_column(String(255), index=True)  # covered by email_username_idx
    username: Mapped[str] = mapped_column(String(100))
    status: Mapped[str] = mapped_column(String(20))
```
Good:
```python
class User(Base):
    __tablename__ = "users"
    # Only composite index needed - covers both email and email+username queries
    __table_args__ = (
        Index("email_username_idx", "email", "username"),
    )
    id: Mapped[int] = mapped_column(primary_key=True)
    email: Mapped[str] = mapped_column(String(255))
    username: Mapped[str] = mapped_column(String(100))
    status: Mapped[str] = mapped_column(String(20))
```