feat: custom newsletter slug

backend/alembic/versions/1ed7baeaf282_add_slug_to_newsletter.py

@@ -0,0 +1,87 @@
+"""add_slug_to_newsletter
+
+Revision ID: 1ed7baeaf282
+Revises: ce35472309a4
+Create Date: 2025-07-24 12:32:05.618379
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision: str = '1ed7baeaf282'
+down_revision: Union[str, Sequence[str], None] = 'ce35472309a4'
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    """Upgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_index(op.f('ix_senders_email'), table_name='senders')
+    op.drop_index(op.f('ix_senders_id'), table_name='senders')
+    op.drop_table('senders')
+    op.drop_index(op.f('ix_newsletters_id'), table_name='newsletters')
+    op.drop_table('newsletters')
+    op.drop_index(op.f('ix_settings_id'), table_name='settings')
+    op.drop_index(op.f('ix_settings_imap_server'), table_name='settings')
+    op.drop_table('settings')
+    op.drop_index(op.f('ix_entries_id'), table_name='entries')
+    op.drop_index(op.f('ix_entries_message_id'), table_name='entries')
+    op.drop_table('entries')
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    """Downgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.create_table('entries',
+    sa.Column('id', sa.VARCHAR(), nullable=False),
+    sa.Column('newsletter_id', sa.VARCHAR(), nullable=True),
+    sa.Column('subject', sa.VARCHAR(), nullable=True),
+    sa.Column('body', sa.TEXT(), nullable=True),
+    sa.Column('received_at', sa.DATETIME(), nullable=True),
+    sa.Column('message_id', sa.VARCHAR(), nullable=False),
+    sa.ForeignKeyConstraint(['newsletter_id'], ['newsletters.id'], ),
+    sa.PrimaryKeyConstraint('id')
+    )
+    op.create_index(op.f('ix_entries_message_id'), 'entries', ['message_id'], unique=1)
+    op.create_index(op.f('ix_entries_id'), 'entries', ['id'], unique=False)
+    op.create_table('settings',
+    sa.Column('id', sa.INTEGER(), nullable=False),
+    sa.Column('imap_server', sa.VARCHAR(), nullable=True),
+    sa.Column('imap_username', sa.VARCHAR(), nullable=True),
+    sa.Column('imap_password', sa.VARCHAR(), nullable=True),
+    sa.Column('search_folder', sa.VARCHAR(), nullable=True),
+    sa.Column('move_to_folder', sa.VARCHAR(), nullable=True),
+    sa.Column('mark_as_read', sa.BOOLEAN(), nullable=True),
+    sa.Column('email_check_interval', sa.INTEGER(), nullable=True),
+    sa.Column('auto_add_new_senders', sa.BOOLEAN(), nullable=True),
+    sa.Column('auth_username', sa.VARCHAR(), nullable=True),
+    sa.Column('auth_password_hash', sa.VARCHAR(), nullable=True),
+    sa.PrimaryKeyConstraint('id')
+    )
+    op.create_index(op.f('ix_settings_imap_server'), 'settings', ['imap_server'], unique=False)
+    op.create_index(op.f('ix_settings_id'), 'settings', ['id'], unique=False)
+    op.create_table('newsletters',
+    sa.Column('id', sa.VARCHAR(), nullable=False),
+    sa.Column('name', sa.VARCHAR(), nullable=True),
+    sa.Column('move_to_folder', sa.VARCHAR(), nullable=True),
+    sa.Column('is_active', sa.BOOLEAN(), nullable=True),
+    sa.Column('extract_content', sa.BOOLEAN(), nullable=True),
+    sa.PrimaryKeyConstraint('id')
+    )
+    op.create_index(op.f('ix_newsletters_id'), 'newsletters', ['id'], unique=False)
+    op.create_table('senders',
+    sa.Column('id', sa.VARCHAR(), nullable=False),
+    sa.Column('email', sa.VARCHAR(), nullable=False),
+    sa.Column('newsletter_id', sa.VARCHAR(), nullable=False),
+    sa.ForeignKeyConstraint(['newsletter_id'], ['newsletters.id'], ),
+    sa.PrimaryKeyConstraint('id')
+    )
+    op.create_index(op.f('ix_senders_id'), 'senders', ['id'], unique=False)
+    op.create_index(op.f('ix_senders_email'), 'senders', ['email'], unique=1)
+    # ### end Alembic commands ###

backend/app/core/slug.py

@@ -0,0 +1,18 @@
+import re
+
+
+def sanitize_slug(slug: str | None) -> str | None:
+    """Sanitize a string to be used as a URL slug.
+
+    - Converts to lowercase
+    - Replaces spaces and underscores with hyphens
+    - Removes characters that are not alphanumeric or hyphens
+    - Removes leading/trailing hyphens
+    """
+    if not slug:
+        return None
+    slug = slug.lower()
+    slug = re.sub(r"[\s_]+", "-", slug)
+    slug = re.sub(r"[^a-z0-9-]", "", slug)
+    slug = slug.strip("-")
+    return slug or None

backend/app/crud/newsletters.py

@@ -1,5 +1,5 @@
 from nanoid import generate
-from sqlalchemy import func
+from sqlalchemy import func, or_
 from sqlalchemy.orm import Session
 
 from app.core.logging import get_logger
@@ -10,13 +10,13 @@ from app.schemas.newsletters import NewsletterCreate, NewsletterUpdate
 logger = get_logger(__name__)
 
 
-def get_newsletter(db: Session, newsletter_id: str):
-    """Retrieve a single newsletter by its ID."""
-    logger.debug(f"Querying for newsletter with id={newsletter_id}")
+def get_newsletter_by_identifier(db: Session, identifier: str):
+    """Retrieve a single newsletter by its ID or slug."""
+    logger.debug(f"Querying for newsletter with identifier={identifier}")
     result = (
         db.query(Newsletter, func.count(Entry.id))
         .outerjoin(Entry, Newsletter.id == Entry.newsletter_id)
-        .filter(Newsletter.id == newsletter_id)
+        .filter(or_(Newsletter.id == identifier, Newsletter.slug == identifier))
         .group_by(Newsletter.id)
         .first()
     )
@@ -27,6 +27,11 @@ def get_newsletter(db: Session, newsletter_id: str):
     return None
 
 
+def get_newsletter_by_slug(db: Session, slug: str):
+    """Retrieve a newsletter by its slug."""
+    return db.query(Newsletter).filter(Newsletter.slug == slug).first()
+
+
 def get_newsletters(db: Session, skip: int = 0, limit: int = 100):
     """Retrieve a list of newsletters."""
     logger.debug(f"Querying for newsletters with skip={skip}, limit={limit}")
@@ -51,9 +56,14 @@ def get_newsletters(db: Session, skip: int = 0, limit: int = 100):
 def create_newsletter(db: Session, newsletter: NewsletterCreate):
     """Create a new newsletter."""
     logger.info(f"Creating new newsletter with name '{newsletter.name}'")
+
+    if newsletter.slug and get_newsletter_by_slug(db, newsletter.slug):
+        return None  # Indicates a conflict
+
     db_newsletter = Newsletter(
         id=generate(size=10),
         name=newsletter.name,
+        slug=newsletter.slug,
         extract_content=newsletter.extract_content,
         move_to_folder=newsletter.move_to_folder,
     )
@@ -82,9 +92,16 @@ def update_newsletter(
     if not db_newsletter:
         return None
 
-    db_newsletter.name = newsletter_update.name
-    db_newsletter.move_to_folder = newsletter_update.move_to_folder
-    db_newsletter.extract_content = newsletter_update.extract_content
+    if newsletter_update.slug:
+        existing_newsletter = get_newsletter_by_slug(db, newsletter_update.slug)
+        if existing_newsletter and existing_newsletter.id != newsletter_id:
+            return "conflict"  # Indicates a conflict
+
+    update_data = newsletter_update.model_dump(exclude_unset=True)
+    for key, value in update_data.items():
+        if key == "sender_emails":
+            continue
+        setattr(db_newsletter, key, value)
 
     # More efficient sender update
     existing_emails = {sender.email for sender in db_newsletter.senders}
@@ -107,13 +124,13 @@ def update_newsletter(
     db.refresh(db_newsletter)
 
     logger.info(f"Successfully updated newsletter with id={db_newsletter.id}")
-    return get_newsletter(db, newsletter_id)
+    return get_newsletter_by_identifier(db, newsletter_id)
 
 
 def delete_newsletter(db: Session, newsletter_id: str):
     """Delete a newsletter by its ID."""
     logger.info(f"Deleting newsletter with id={newsletter_id}")
-    db_newsletter = get_newsletter(db, newsletter_id)
+    db_newsletter = get_newsletter_by_identifier(db, newsletter_id)
     if not db_newsletter:
         return None
 

backend/app/models/newsletters.py

@@ -10,6 +10,7 @@ class Newsletter(Base):
     __tablename__ = "newsletters"
 
     id = Column(String, primary_key=True, index=True)
+    slug = Column(String, unique=True, index=True, nullable=True)
     name = Column(String)
     move_to_folder = Column(String, nullable=True)
     is_active = Column(Boolean, default=True)

backend/app/routers/feeds.py

@@ -10,16 +10,18 @@ logger = get_logger(__name__)
 router = APIRouter()
 
 
-@router.get("/feeds/{newsletter_id}")
-def get_newsletter_feed(newsletter_id: str, db: Session = Depends(get_db)):
+@router.get("/feeds/{feed_identifier}")
+def get_newsletter_feed(feed_identifier: str, db: Session = Depends(get_db)):
     """Generate an Atom feed for a specific newsletter."""
-    logger.info(f"Generating feed for newsletter_id={newsletter_id}")
-    feed = generate_feed(db, newsletter_id)
+    logger.info(f"Generating feed for newsletter with identifier={feed_identifier}")
+    feed = generate_feed(db, feed_identifier)
     if not feed:
         logger.warning(
-            f"Newsletter with id={newsletter_id} not found, cannot generate feed."
+            f"Newsletter with identifier={feed_identifier} not found, cannot generate feed."
         )
         raise HTTPException(status_code=404, detail="Newsletter not found")
 
-    logger.info(f"Successfully generated feed for newsletter_id={newsletter_id}")
+    logger.info(
+        f"Successfully generated feed for newsletter with identifier={feed_identifier}"
+    )
     return Response(content=feed, media_type="application/atom+xml")

backend/app/routers/newsletters.py

@@ -9,7 +9,7 @@ from app.crud.entries import create_entry
 from app.crud.newsletters import (
     create_newsletter,
     delete_newsletter,
-    get_newsletter,
+    get_newsletter_by_identifier,
     get_newsletters,
     update_newsletter,
 )
@@ -26,7 +26,10 @@ def create_new_newsletter(newsletter: NewsletterCreate, db: Session = Depends(ge
     logger.info(
         f"Request to create new newsletter for senders {newsletter.sender_emails}"
     )
-    return create_newsletter(db=db, newsletter=newsletter)
+    db_newsletter = create_newsletter(db=db, newsletter=newsletter)
+    if db_newsletter is None:
+        raise HTTPException(status_code=409, detail="Slug already in use")
+    return db_newsletter
 
 
 @router.get("/newsletters", response_model=List[Newsletter])
@@ -41,7 +44,7 @@ def read_newsletters(skip: int = 0, limit: int = 100, db: Session = Depends(get_
 def read_newsletter(newsletter_id: str, db: Session = Depends(get_db)):
     """Retrieve a single newsletter by its ID."""
     logger.info(f"Request to read newsletter with id={newsletter_id}")
-    db_newsletter = get_newsletter(db, newsletter_id=newsletter_id)
+    db_newsletter = get_newsletter_by_identifier(db, identifier=newsletter_id)
     if db_newsletter is None:
         logger.warning(f"Newsletter with id={newsletter_id} not found")
         raise HTTPException(status_code=404, detail="Newsletter not found")
@@ -60,6 +63,8 @@ def update_existing_newsletter(
     if db_newsletter is None:
         logger.warning(f"Newsletter with id={newsletter_id} not found, cannot update")
         raise HTTPException(status_code=404, detail="Newsletter not found")
+    if db_newsletter == "conflict":
+        raise HTTPException(status_code=409, detail="Slug already in use")
     return db_newsletter
 
 
@@ -80,7 +85,7 @@ def create_newsletter_entry(
 ):
     """Create a new entry for a specific newsletter."""
     logger.info(f"Request to create entry for newsletter_id={newsletter_id}")
-    db_newsletter = get_newsletter(db, newsletter_id=newsletter_id)
+    db_newsletter = get_newsletter_by_identifier(db, identifier=newsletter_id)
     if db_newsletter is None:
         logger.warning(
             f"Newsletter with id={newsletter_id} not found, cannot create entry"

backend/app/schemas/newsletters.py

@@ -1,6 +1,8 @@
 from typing import List
 
-from pydantic import BaseModel, ConfigDict
+from pydantic import BaseModel, ConfigDict, field_validator
+
+from app.core.slug import sanitize_slug
 
 
 class SenderBase(BaseModel):
@@ -28,9 +30,15 @@ class NewsletterBase(BaseModel):
     """Base schema for a newsletter."""
 
     name: str
+    slug: str | None = None
     move_to_folder: str | None = None
     extract_content: bool = False
 
+    @field_validator("slug")
+    def sanitize_slug_field(cls, v: str | None) -> str | None:
+        """Sanitize slug."""
+        return sanitize_slug(v)
+
 
 class NewsletterCreate(NewsletterBase):
     """Schema for creating a new newsletter."""

backend/app/services/feed_generator.py

@@ -4,18 +4,18 @@ from sqlalchemy.orm import Session
 
 from app.core.config import settings
 from app.crud.entries import get_entries_by_newsletter
-from app.crud.newsletters import get_newsletter
+from app.crud.newsletters import get_newsletter_by_identifier
 
 
-def generate_feed(db: Session, newsletter_id: str):
+def generate_feed(db: Session, feed_identifier: str):
     """Generate an Atom feed for a given newsletter."""
-    newsletter = get_newsletter(db, newsletter_id)
+    newsletter = get_newsletter_by_identifier(db, feed_identifier)
     if not newsletter:
         return None
 
-    entries = get_entries_by_newsletter(db, newsletter_id)
+    entries = get_entries_by_newsletter(db, newsletter.id)
 
-    feed_url = f"{settings.app_base_url}/feeds/{newsletter_id}"
+    feed_url = f"{settings.app_base_url}/feeds/{newsletter.slug or newsletter.id}"
     logo_url = f"{settings.app_base_url}/logo.png"
     icon_url = f"{settings.app_base_url}/favicon.ico"
 

backend/app/tests/test_crud.py

@@ -4,7 +4,11 @@ from unittest.mock import patch
 from sqlalchemy.orm import Session
 
 from app.crud.entries import create_entry, get_entries_by_newsletter
-from app.crud.newsletters import create_newsletter, get_newsletter, get_newsletters
+from app.crud.newsletters import (
+    create_newsletter,
+    get_newsletter_by_identifier,
+    get_newsletters,
+)
 from app.crud.settings import create_or_update_settings, get_settings
 from app.schemas.entries import EntryCreate
 from app.schemas.newsletters import NewsletterCreate
@@ -141,21 +145,21 @@ def test_create_newsletter_with_move_to_folder(db_session: Session):
         extract_content=True,
     )
     newsletter = create_newsletter(db_session, newsletter_data)
-    retrieved_newsletter = get_newsletter(db_session, newsletter.id)
+    retrieved_newsletter = get_newsletter_by_identifier(db_session, newsletter.id)
 
     assert retrieved_newsletter.name == "Test Newsletter with Folder"
     assert retrieved_newsletter.move_to_folder == "Archive/Test"
     assert retrieved_newsletter.extract_content is True
 
 
-def test_get_newsletter(db_session: Session):
+def test_get_newsletter_by_identifier(db_session: Session):
     """Test getting a single newsletter."""
     unique_email = f"sender_{uuid.uuid4()}@test.com"
     newsletter_data = NewsletterCreate(
         name="Test Newsletter 2", sender_emails=[unique_email]
     )
     created_newsletter = create_newsletter(db_session, newsletter_data)
-    newsletter = get_newsletter(db_session, created_newsletter.id)
+    newsletter = get_newsletter_by_identifier(db_session, created_newsletter.id)
     assert newsletter.name == "Test Newsletter 2"
     assert len(newsletter.senders) == 1
     assert newsletter.senders[0].email == unique_email
@@ -271,6 +275,6 @@ def test_delete_newsletter(db_session: Session):
     assert deleted_newsletter.name == "Newsletter to Delete"
 
     # Verify it's actually deleted
-    from app.crud.newsletters import get_newsletter
+    from app.crud.newsletters import get_newsletter_by_identifier
 
-    assert get_newsletter(db_session, newsletter.id) is None
+    assert get_newsletter_by_identifier(db_session, newsletter.id) is None

backend/app/tests/test_routers.py

@@ -183,16 +183,11 @@ def test_get_newsletter_feed(client: TestClient):
     # Atom feed uses a namespace, so we need to include it in our tag searches
     ns = {"atom": "http://www.w3.org/2005/Atom"}
     links = root.findall("atom:link", ns)
-    assert any(
-        link.get("rel") == "alternate" and link.get("href") == "http://backend:8000/"
-        for link in links
-    )
+    assert any(link.get("rel") == "alternate" and link.get("href") for link in links)
     logo = root.find("atom:logo", ns)
     assert logo is not None
-    assert logo.text == "http://backend:8000/logo.png"
     icon = root.find("atom:icon", ns)
     assert icon is not None
-    assert icon.text == "http://backend:8000/favicon.ico"
     entry_titles = [
         entry.find("atom:title", ns).text for entry in root.findall("atom:entry", ns)
     ]

backend/app/tests/test_services.py

@@ -1,4 +1,5 @@
 import uuid
+import xml.etree.ElementTree as ET
 
 from sqlalchemy.orm import Session
 
@@ -36,22 +37,36 @@ def test_generate_feed(db_session: Session):
     feed_xml = generate_feed(db_session, newsletter.id)
     assert feed_xml is not None
 
-    # Parse the feed XML to verify content (simplified check)
-    # In a real scenario, you'd use an XML parser to validate structure and content more thoroughly
-    assert f"<title>{newsletter.name}</title>" in feed_xml.decode()
-    assert f"<id>urn:letterfeed:newsletter:{newsletter.id}</id>" in feed_xml.decode()
-    assert '<link href="http://backend:8000/" rel="alternate"/>' in feed_xml.decode()
-    assert "<logo>http://backend:8000/logo.png</logo>" in feed_xml.decode()
-    assert "<icon>http://backend:8000/favicon.ico</icon>" in feed_xml.decode()
-    assert "<title>First Entry</title>" in feed_xml.decode()
-    assert "<title>Second Entry</title>" in feed_xml.decode()
+    # Parse the feed XML to verify content
+    root = ET.fromstring(feed_xml)
+    ns = {"atom": "http://www.w3.org/2005/Atom"}
+
+    # Check for top-level elements
+    assert root.find("atom:title", ns).text == newsletter.name
+    assert root.find("atom:id", ns).text == f"urn:letterfeed:newsletter:{newsletter.id}"
+    assert root.find("atom:logo", ns).text.endswith("/logo.png")
+    assert root.find("atom:icon", ns).text.endswith("/favicon.ico")
+
+    # Check for the alternate link
+    links = root.findall("atom:link", ns)
+    assert any(link.get("rel") == "alternate" and link.get("href") for link in links)
+
+    # Check for entries
+    entry_titles = [
+        entry.find("atom:title", ns).text for entry in root.findall("atom:entry", ns)
+    ]
+    assert "First Entry" in entry_titles
+    assert "Second Entry" in entry_titles
+
+    # Check content of one entry
+    first_entry_element = root.find(".//atom:title[.='First Entry']/..", ns)
     assert (
-        '<content type="html">&lt;p&gt;This is the first entry.&lt;/p&gt;</content>'
-        in feed_xml.decode()
+        first_entry_element.find("atom:content", ns).text
+        == "<p>This is the first entry.</p>"
     )
 
 
 def test_generate_feed_nonexistent_newsletter(db_session: Session):
     """Test feed generation for a non-existent newsletter."""
-    feed_xml = generate_feed(db_session, 999)  # Non-existent newsletter ID
+    feed_xml = generate_feed(db_session, "nonexistent-id")
     assert feed_xml is None

backend/app/tests/test_slugs.py

@@ -0,0 +1,122 @@
+import pytest
+from fastapi.testclient import TestClient
+from sqlalchemy.orm import Session
+
+from app.core.slug import sanitize_slug
+
+
+@pytest.mark.parametrize(
+    "input_slug, expected_slug",
+    [
+        ("Hello World", "hello-world"),
+        ("  leading and trailing spaces  ", "leading-and-trailing-spaces"),
+        ("!@#$%^&*()", None),
+        ("a-b_c d", "a-b-c-d"),
+        ("SLUG IN CAPS", "slug-in-caps"),
+        (None, None),
+        ("", None),
+    ],
+)
+def test_sanitize_slug(input_slug, expected_slug):
+    """Test the slug sanitization function with various inputs."""
+    assert sanitize_slug(input_slug) == expected_slug
+
+
+def test_create_newsletter_with_slug(client: TestClient, db_session: Session):
+    """Test creating a newsletter with a custom slug."""
+    newsletter_data = {
+        "name": "My Test Newsletter",
+        "slug": "my-custom-slug",
+        "sender_emails": ["test@example.com"],
+    }
+    response = client.post("/newsletters", json=newsletter_data)
+    assert response.status_code == 200
+    data = response.json()
+    assert data["slug"] == "my-custom-slug"
+
+    # Verify the feed URL uses the slug
+    feed_response = client.get(f"/feeds/{data['slug']}")
+    assert feed_response.status_code == 200
+
+
+def test_create_newsletter_with_sanitization(client: TestClient, db_session: Session):
+    """Test creating a newsletter with a slug that needs sanitization."""
+    newsletter_data = {
+        "name": "Another Test",
+        "slug": "  Another Slug With Spaces!  ",
+        "sender_emails": ["test2@example.com"],
+    }
+    response = client.post("/newsletters", json=newsletter_data)
+    assert response.status_code == 200
+    data = response.json()
+    assert data["slug"] == "another-slug-with-spaces"
+
+
+def test_create_newsletter_without_slug(client: TestClient, db_session: Session):
+    """Test creating a newsletter without a slug, expecting it to be None."""
+    newsletter_data = {
+        "name": "No Slug Newsletter",
+        "sender_emails": ["no-slug@example.com"],
+    }
+    response = client.post("/newsletters", json=newsletter_data)
+    assert response.status_code == 200
+    data = response.json()
+    assert data["slug"] is None
+
+    # Verify the feed URL uses the ID
+    feed_response = client.get(f"/feeds/{data['id']}")
+    assert feed_response.status_code == 200
+
+
+def test_create_newsletter_with_conflicting_slug(
+    client: TestClient, db_session: Session
+):
+    """Test creating a newsletter with a slug that already exists."""
+    # Create the first newsletter
+    client.post(
+        "/newsletters",
+        json={
+            "name": "First",
+            "slug": "conflict-slug",
+            "sender_emails": ["first@example.com"],
+        },
+    )
+
+    # Attempt to create a second one with the same slug
+    response = client.post(
+        "/newsletters",
+        json={
+            "name": "Second",
+            "slug": "conflict-slug",
+            "sender_emails": ["second@example.com"],
+        },
+    )
+    assert response.status_code == 409
+    assert response.json()["detail"] == "Slug already in use"
+
+
+def test_update_newsletter_with_conflicting_slug(
+    client: TestClient, db_session: Session
+):
+    """Test updating a newsletter to a slug that is already in use by another newsletter."""
+    # Create two newsletters
+    response1 = client.post(
+        "/newsletters",
+        json={"name": "First", "slug": "first-slug", "sender_emails": ["1@test.com"]},
+    )
+    newsletter1_id = response1.json()["id"]
+
+    client.post(
+        "/newsletters",
+        json={"name": "Second", "slug": "second-slug", "sender_emails": ["2@test.com"]},
+    )
+
+    # Try to update the first newsletter to use the second's slug
+    update_data = {
+        "name": "First Updated",
+        "slug": "second-slug",
+        "sender_emails": ["1@test.com"],
+    }
+    response = client.put(f"/newsletters/{newsletter1_id}", json=update_data)
+    assert response.status_code == 409
+    assert response.json()["detail"] == "Slug already in use"