fasthx-admin 0.1.1

FastAPI + HTMX + Jinja2 admin interface framework — a modern replacement for Flask-Admin

fasthx-admin

FastAPI + HTMX + Jinja2 admin interface framework — a modern replacement for Flask-Admin.

Features

• Auto-generated CRUD routes from SQLAlchemy models
• Dark/light theme with Bootstrap 5.3
• HTMX-powered interactions (search, sorting, polling, dependent dropdowns)
• Accordion-grouped form sections
• Custom column formatters and row actions
• OIDC/Keycloak authentication (with AUTH_DISABLED dev mode)
• Deploy wizard with real-time progress tracking
• Responsive sidebar navigation

Installation

pip install fasthx-admin

For development (includes uvicorn):

pip install fasthx-admin[dev]

Quick Start

from contextlib import asynccontextmanager

from fastapi import FastAPI
from starlette.middleware.sessions import SessionMiddleware

from fasthx_admin import Admin, CRUDView, Base, init_db

# 1. Define your models
from sqlalchemy import Column, Integer, String

class Customer(Base):
    __tablename__ = "customers"
    id = Column(Integer, primary_key=True)
    name = Column(String(100), nullable=False)
    sid = Column(String(50), nullable=False)

    __admin_category__ = "CRM"
    __admin_icon__ = "building"
    __admin_name__ = "Customers"

# 2. Initialise the database
engine = init_db("sqlite:///./app.db", connect_args={"check_same_thread": False})

# 3. Create the app
@asynccontextmanager
async def lifespan(app):
    Base.metadata.create_all(bind=engine)
    yield

app = FastAPI(lifespan=lifespan)
app.add_middleware(SessionMiddleware, secret_key="change-me")

# 4. Create the admin and register views
admin = Admin(app, title="My Admin")

class CustomerView(CRUDView):
    model = Customer
    column_list = ["id", "name", "sid"]

admin.add_view(CustomerView)

Run with auth disabled for development:

AUTH_DISABLED=1 uvicorn app:app --reload

CRUDView Configuration

Subclass CRUDView and set class-level attributes:

Attribute	Description
model	SQLAlchemy model class (required)
name	URL prefix (defaults to __tablename__)
display_name	Sidebar label (defaults to model's __admin_name__)
category	Sidebar group (defaults to model's __admin_category__)
icon	Bootstrap Icons name (defaults to model's __admin_icon__)
column_list	Columns to show in the list view
column_exclude	Columns to exclude (alternative to column_list)
column_labels	Display name overrides, e.g. {"customer_id": "Customer"}
column_formatters	{col: fn(value, obj) -> html_string}
column_searchable	Columns to search (defaults to all String columns)
column_sortable	Columns that can be sorted
form_columns	Editable fields (defaults to all except id)
form_sections	Accordion groups: {"Section": ["field1", "field2"]}
form_widget_overrides	Per-field HTMX attrs or select choices
row_actions	Custom action buttons per row
htmx_columns	Auto-polling cells: {"field": {"url": "...", "trigger": "every 3s"}}
page_size	Records per page (default 20)
can_create / can_edit / can_delete	Permission flags

Custom Endpoints

Override setup_endpoints() on your CRUDView subclass to add custom routes:

class OrchestratorView(CRUDView):
    model = Orchestrator

    def setup_endpoints(self):
        @self.router.post(f"/{self.name}/{{item_id}}/build")
        async def build(request: Request, item_id: int, db=Depends(get_db)):
            # custom logic
            return HTMLResponse("", headers={"HX-Redirect": f"/{self.name}"})

Admin Class

admin = Admin(
    app,
    title="My Admin",           # Sidebar brand + page titles
    static_url="/static/fasthx-admin",  # Where package statics are mounted
    public_pages={"login.html"},        # Pages that skip auth check
)

The Admin instance:

• Mounts built-in static files (CSS, JS)
• Sets up Jinja2 templates from the package
• Wraps template responses with nav context + auth check
• Provides admin.templates for rendering custom pages

Model Metadata

Set these on your SQLAlchemy model classes for automatic sidebar grouping:

class MyModel(Base):
    __tablename__ = "my_models"
    __admin_category__ = "Section Name"  # Sidebar group
    __admin_icon__ = "table"             # Bootstrap Icons name
    __admin_name__ = "My Models"         # Display label

Environment Variables

Variable	Purpose	Default
AUTH_DISABLED	Bypass authentication (1/true/yes)	disabled
SESSION_SECRET	Session signing key	(set in your app)
OIDC_SECRETS	Path to client_secrets.json	./client_secrets.json

Running the Demo

cd examples/demo
pip install -e ../..
pip install uvicorn[standard]
AUTH_DISABLED=1 uvicorn app:app --reload

Open http://127.0.0.1:8000