feat: Add slug support for all entities

- Add slug fields to Song, Venue, Show, Tour, Performance models
- Update routers to support lookup by slug or ID
- Create slugify.py utility for generating URL-safe slugs
- Add migration script to generate slugs for existing data
- Performance slugs use songslug-YYYY-MM-DD format

backend/migrations/add_slugs.py

@@ -0,0 +1,224 @@
+"""
+Migration script to add slug columns and generate slugs for existing data
+"""
+import os
+import sys
+sys.path.insert(0, os.path.dirname(os.path.abspath(__file__)))
+
+from sqlmodel import create_engine, Session, select, text
+from slugify import generate_slug, generate_show_slug, generate_performance_slug
+
+DATABASE_URL = os.getenv("DATABASE_URL", "postgresql://elmeg:elmeg@localhost/elmeg")
+engine = create_engine(DATABASE_URL)
+
+def add_slug_columns():
+    """Add slug columns to tables if they don't exist"""
+    with engine.connect() as conn:
+        # Add slug to song
+        conn.execute(text("ALTER TABLE song ADD COLUMN IF NOT EXISTS slug VARCHAR UNIQUE"))
+        conn.execute(text("CREATE INDEX IF NOT EXISTS ix_song_slug ON song(slug)"))
+        
+        # Add slug to venue
+        conn.execute(text("ALTER TABLE venue ADD COLUMN IF NOT EXISTS slug VARCHAR UNIQUE"))
+        conn.execute(text("CREATE INDEX IF NOT EXISTS ix_venue_slug ON venue(slug)"))
+        
+        # Add slug to show
+        conn.execute(text("ALTER TABLE show ADD COLUMN IF NOT EXISTS slug VARCHAR UNIQUE"))
+        conn.execute(text("CREATE INDEX IF NOT EXISTS ix_show_slug ON show(slug)"))
+        
+        # Add slug to tour
+        conn.execute(text("ALTER TABLE tour ADD COLUMN IF NOT EXISTS slug VARCHAR UNIQUE"))
+        conn.execute(text("CREATE INDEX IF NOT EXISTS ix_tour_slug ON tour(slug)"))
+        
+        # Add slug to performance
+        conn.execute(text("ALTER TABLE performance ADD COLUMN IF NOT EXISTS slug VARCHAR UNIQUE"))
+        conn.execute(text("CREATE INDEX IF NOT EXISTS ix_performance_slug ON performance(slug)"))
+        
+        conn.commit()
+        print("✓ Slug columns added")
+
+def generate_song_slugs():
+    """Generate slugs for all songs"""
+    with Session(engine) as session:
+        # Get all songs without slugs
+        result = session.exec(text("SELECT id, title FROM song WHERE slug IS NULL"))
+        songs = result.fetchall()
+        
+        existing_slugs = set()
+        # Get existing slugs
+        existing = session.exec(text("SELECT slug FROM song WHERE slug IS NOT NULL"))
+        for row in existing.fetchall():
+            existing_slugs.add(row[0])
+        
+        count = 0
+        for song_id, title in songs:
+            base_slug = generate_slug(title, 50)
+            slug = base_slug
+            counter = 2
+            
+            while slug in existing_slugs:
+                slug = f"{base_slug}-{counter}"
+                counter += 1
+            
+            existing_slugs.add(slug)
+            session.execute(
+                text("UPDATE song SET slug = :slug WHERE id = :id"),
+                {"slug": slug, "id": song_id}
+            )
+            count += 1
+        
+        session.commit()
+        print(f"✓ Generated slugs for {count} songs")
+
+def generate_venue_slugs():
+    """Generate slugs for all venues"""
+    with Session(engine) as session:
+        result = session.exec(text("SELECT id, name, city FROM venue WHERE slug IS NULL"))
+        venues = result.fetchall()
+        
+        existing_slugs = set()
+        existing = session.exec(text("SELECT slug FROM venue WHERE slug IS NOT NULL"))
+        for row in existing.fetchall():
+            existing_slugs.add(row[0])
+        
+        count = 0
+        for venue_id, name, city in venues:
+            # Include city to help disambiguate
+            base_slug = generate_slug(f"{name} {city}", 60)
+            slug = base_slug
+            counter = 2
+            
+            while slug in existing_slugs:
+                slug = f"{base_slug}-{counter}"
+                counter += 1
+            
+            existing_slugs.add(slug)
+            session.execute(
+                text("UPDATE venue SET slug = :slug WHERE id = :id"),
+                {"slug": slug, "id": venue_id}
+            )
+            count += 1
+        
+        session.commit()
+        print(f"✓ Generated slugs for {count} venues")
+
+def generate_show_slugs():
+    """Generate slugs for all shows"""
+    with Session(engine) as session:
+        result = session.exec(text("""
+            SELECT s.id, s.date, v.name 
+            FROM show s
+            LEFT JOIN venue v ON s.venue_id = v.id
+            WHERE s.slug IS NULL
+        """))
+        shows = result.fetchall()
+        
+        existing_slugs = set()
+        existing = session.exec(text("SELECT slug FROM show WHERE slug IS NOT NULL"))
+        for row in existing.fetchall():
+            existing_slugs.add(row[0])
+        
+        count = 0
+        for show_id, date, venue_name in shows:
+            date_str = date.strftime("%Y-%m-%d") if date else "unknown"
+            venue_slug = generate_slug(venue_name or "unknown", 25)
+            base_slug = f"{date_str}-{venue_slug}"
+            slug = base_slug
+            counter = 2
+            
+            while slug in existing_slugs:
+                slug = f"{base_slug}-{counter}"
+                counter += 1
+            
+            existing_slugs.add(slug)
+            session.execute(
+                text("UPDATE show SET slug = :slug WHERE id = :id"),
+                {"slug": slug, "id": show_id}
+            )
+            count += 1
+        
+        session.commit()
+        print(f"✓ Generated slugs for {count} shows")
+
+def generate_tour_slugs():
+    """Generate slugs for all tours"""
+    with Session(engine) as session:
+        result = session.exec(text("SELECT id, name FROM tour WHERE slug IS NULL"))
+        tours = result.fetchall()
+        
+        existing_slugs = set()
+        existing = session.exec(text("SELECT slug FROM tour WHERE slug IS NOT NULL"))
+        for row in existing.fetchall():
+            existing_slugs.add(row[0])
+        
+        count = 0
+        for tour_id, name in tours:
+            base_slug = generate_slug(name, 50)
+            slug = base_slug
+            counter = 2
+            
+            while slug in existing_slugs:
+                slug = f"{base_slug}-{counter}"
+                counter += 1
+            
+            existing_slugs.add(slug)
+            session.execute(
+                text("UPDATE tour SET slug = :slug WHERE id = :id"),
+                {"slug": slug, "id": tour_id}
+            )
+            count += 1
+        
+        session.commit()
+        print(f"✓ Generated slugs for {count} tours")
+
+def generate_performance_slugs():
+    """Generate slugs for all performances (songslug-date format)"""
+    with Session(engine) as session:
+        result = session.exec(text("""
+            SELECT p.id, s.slug as song_slug, sh.date
+            FROM performance p
+            JOIN song s ON p.song_id = s.id
+            JOIN show sh ON p.show_id = sh.id
+            WHERE p.slug IS NULL
+        """))
+        performances = result.fetchall()
+        
+        existing_slugs = set()
+        existing = session.exec(text("SELECT slug FROM performance WHERE slug IS NOT NULL"))
+        for row in existing.fetchall():
+            existing_slugs.add(row[0])
+        
+        count = 0
+        for perf_id, song_slug, date in performances:
+            date_str = date.strftime("%Y-%m-%d") if date else "unknown"
+            base_slug = f"{song_slug}-{date_str}"
+            slug = base_slug
+            counter = 2
+            
+            # Handle multiple performances of same song in same show
+            while slug in existing_slugs:
+                slug = f"{base_slug}-{counter}"
+                counter += 1
+            
+            existing_slugs.add(slug)
+            session.execute(
+                text("UPDATE performance SET slug = :slug WHERE id = :id"),
+                {"slug": slug, "id": perf_id}
+            )
+            count += 1
+        
+        session.commit()
+        print(f"✓ Generated slugs for {count} performances")
+
+def run_migration():
+    print("=== Running Slug Migration ===")
+    add_slug_columns()
+    generate_song_slugs()
+    generate_venue_slugs()
+    generate_tour_slugs()
+    generate_show_slugs()
+    generate_performance_slugs()  # Must run after song slugs
+    print("=== Migration Complete ===")
+
+if __name__ == "__main__":
+    run_migration()

backend/models.py

@@ -6,6 +6,7 @@ from datetime import datetime
 class Performance(SQLModel, table=True):
     """Link table between Show and Song (Many-to-Many with extra data)"""
     id: Optional[int] = Field(default=None, primary_key=True)
+    slug: Optional[str] = Field(default=None, unique=True, index=True, description="songslug-YYYY-MM-DD")
     show_id: int = Field(foreign_key="show.id")
     song_id: int = Field(foreign_key="song.id")
     position: int = Field(description="Order in the setlist")
@@ -64,6 +65,7 @@ class Vertical(SQLModel, table=True):
 class Venue(SQLModel, table=True):
     id: Optional[int] = Field(default=None, primary_key=True)
     name: str = Field(index=True)
+    slug: Optional[str] = Field(default=None, unique=True, index=True)
     city: str
     state: Optional[str] = Field(default=None)
     country: str
@@ -75,6 +77,7 @@ class Venue(SQLModel, table=True):
 class Tour(SQLModel, table=True):
     id: Optional[int] = Field(default=None, primary_key=True)
     name: str = Field(index=True)
+    slug: Optional[str] = Field(default=None, unique=True, index=True)
     start_date: Optional[datetime] = None
     end_date: Optional[datetime] = None
     notes: Optional[str] = Field(default=None)
@@ -90,6 +93,7 @@ class Artist(SQLModel, table=True):
 class Show(SQLModel, table=True):
     id: Optional[int] = Field(default=None, primary_key=True)
     date: datetime = Field(index=True)
+    slug: Optional[str] = Field(default=None, unique=True, index=True)
     vertical_id: int = Field(foreign_key="vertical.id")
     venue_id: Optional[int] = Field(default=None, foreign_key="venue.id")
     tour_id: Optional[int] = Field(default=None, foreign_key="tour.id")
@@ -109,6 +113,7 @@ class Show(SQLModel, table=True):
 class Song(SQLModel, table=True):
     id: Optional[int] = Field(default=None, primary_key=True)
     title: str = Field(index=True)
+    slug: Optional[str] = Field(default=None, unique=True, index=True)
     original_artist: Optional[str] = Field(default=None)
     vertical_id: int = Field(foreign_key="vertical.id")
     notes: Optional[str] = Field(default=None)

backend/routers/performances.py

@@ -8,12 +8,23 @@ from auth import get_current_user
 
 router = APIRouter(prefix="/performances", tags=["performances"])
 
-@router.get("/{performance_id}", response_model=PerformanceDetailRead)
-def read_performance(performance_id: int, session: Session = Depends(get_session)):
-    performance = session.get(Performance, performance_id)
+@router.get("/{performance_id_or_slug}", response_model=PerformanceDetailRead)
+def read_performance(performance_id_or_slug: str, session: Session = Depends(get_session)):
+    performance = None
+    if performance_id_or_slug.isdigit():
+        performance = session.get(Performance, int(performance_id_or_slug))
+    
+    if not performance:
+        # Try slug lookup
+        performance = session.exec(
+            select(Performance).where(Performance.slug == performance_id_or_slug)
+        ).first()
+    
     if not performance:
         raise HTTPException(status_code=404, detail="Performance not found")
     
+    performance_id = performance.id  # Use actual ID for lookups
+    
     # --- Calculate Stats & Navigation ---
     from sqlmodel import select, func, desc
     from models import Show

backend/routers/songs.py

@@ -24,12 +24,21 @@ def read_songs(offset: int = 0, limit: int = Query(default=100, le=100), session
 
 from services.stats import get_song_stats
 
-@router.get("/{song_id}", response_model=SongReadWithStats)
-def read_song(song_id: int, session: Session = Depends(get_session)):
-    song = session.get(Song, song_id)
+@router.get("/{song_id_or_slug}", response_model=SongReadWithStats)
+def read_song(song_id_or_slug: str, session: Session = Depends(get_session)):
+    # Try to parse as int (ID), otherwise treat as slug
+    song = None
+    if song_id_or_slug.isdigit():
+        song = session.get(Song, int(song_id_or_slug))
+    
+    if not song:
+        # Try slug lookup
+        song = session.exec(select(Song).where(Song.slug == song_id_or_slug)).first()
+    
     if not song:
         raise HTTPException(status_code=404, detail="Song not found")
     
+    song_id = song.id  # Use actual ID for lookups
     stats = get_song_stats(session, song_id)
     
     tags = session.exec(

backend/routers/venues.py

@@ -21,9 +21,15 @@ def read_venues(offset: int = 0, limit: int = Query(default=100, le=100), sessio
     venues = session.exec(select(Venue).offset(offset).limit(limit)).all()
     return venues
 
-@router.get("/{venue_id}", response_model=VenueRead)
-def read_venue(venue_id: int, session: Session = Depends(get_session)):
-    venue = session.get(Venue, venue_id)
+@router.get("/{venue_id_or_slug}", response_model=VenueRead)
+def read_venue(venue_id_or_slug: str, session: Session = Depends(get_session)):
+    venue = None
+    if venue_id_or_slug.isdigit():
+        venue = session.get(Venue, int(venue_id_or_slug))
+    
+    if not venue:
+        venue = session.exec(select(Venue).where(Venue.slug == venue_id_or_slug)).first()
+    
     if not venue:
         raise HTTPException(status_code=404, detail="Venue not found")
     return venue

backend/slugify.py

@@ -0,0 +1,134 @@
+"""
+Slug generation utilities
+"""
+import re
+from typing import Optional
+
+def generate_slug(text: str, max_length: int = 50) -> str:
+    """
+    Generate a URL-safe slug from text.
+    
+    Examples:
+        "Tweezer Reprise" -> "tweezer-reprise"
+        "You Enjoy Myself" -> "you-enjoy-myself"
+        "The Gorge Amphitheatre" -> "the-gorge-amphitheatre"
+    """
+    if not text:
+        return ""
+    
+    # Convert to lowercase
+    slug = text.lower()
+    
+    # Replace common special characters
+    replacements = {
+        "'": "",
+        "'": "",
+        '"': "",
+        "&": "and",
+        "+": "and",
+        "@": "at",
+        "#": "",
+        "$": "",
+        "%": "",
+        "!": "",
+        "?": "",
+        ".": "",
+        ",": "",
+        ":": "",
+        ";": "",
+        "/": "-",
+        "\\": "-",
+        "(": "",
+        ")": "",
+        "[": "",
+        "]": "",
+        "{": "",
+        "}": "",
+        "<": "",
+        ">": "",
+        "—": "-",
+        "–": "-",
+        "...": "",
+    }
+    
+    for old, new in replacements.items():
+        slug = slug.replace(old, new)
+    
+    # Replace any non-alphanumeric characters with dashes
+    slug = re.sub(r'[^a-z0-9]+', '-', slug)
+    
+    # Remove leading/trailing dashes and collapse multiple dashes
+    slug = re.sub(r'-+', '-', slug).strip('-')
+    
+    # Truncate to max length (at word boundary if possible)
+    if len(slug) > max_length:
+        slug = slug[:max_length]
+        # Try to cut at last dash to avoid partial words
+        last_dash = slug.rfind('-')
+        if last_dash > max_length // 2:
+            slug = slug[:last_dash]
+    
+    return slug
+
+
+def generate_unique_slug(
+    base_text: str,
+    existing_slugs: list[str],
+    max_length: int = 50
+) -> str:
+    """
+    Generate a unique slug, appending numbers if necessary.
+    
+    Examples:
+        "Tweezer" with existing ["tweezer"] -> "tweezer-2"
+        "Tweezer" with existing ["tweezer", "tweezer-2"] -> "tweezer-3"
+    """
+    base_slug = generate_slug(base_text, max_length - 4)  # Leave room for "-999"
+    
+    if base_slug not in existing_slugs:
+        return base_slug
+    
+    # Find next available number
+    counter = 2
+    while f"{base_slug}-{counter}" in existing_slugs:
+        counter += 1
+    
+    return f"{base_slug}-{counter}"
+
+
+def generate_show_slug(date_str: str, venue_name: str) -> str:
+    """
+    Generate a slug for a show based on date and venue.
+    
+    Examples:
+        "2024-12-31", "Madison Square Garden" -> "2024-12-31-msg"
+        "2024-07-04", "The Gorge Amphitheatre" -> "2024-07-04-the-gorge"
+    """
+    # Common venue abbreviations
+    abbreviations = {
+        "madison square garden": "msg",
+        "red rocks amphitheatre": "red-rocks",
+        "the gorge amphitheatre": "the-gorge",
+        "alpine valley music theatre": "alpine",
+        "dicks sporting goods park": "dicks",
+        "mgm grand garden arena": "mgm",
+        "saratoga performing arts center": "spac",
+    }
+    
+    venue_slug = abbreviations.get(venue_name.lower())
+    if not venue_slug:
+        # Take first 2-3 words of venue name
+        venue_slug = generate_slug(venue_name, 25)
+    
+    return f"{date_str}-{venue_slug}"
+
+
+def generate_performance_slug(song_title: str, show_date: str) -> str:
+    """
+    Generate a slug for a specific performance.
+    
+    Examples:
+        "Tweezer", "2024-12-31" -> "tweezer-2024-12-31"
+    """
+    song_slug = generate_slug(song_title, 30)
+    return f"{song_slug}-{show_date}"