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# Dify Backend API
## Usage
1. Start the docker-compose stack
The backend require some middleware, including PostgreSQL, Redis, and Weaviate, which can be started together using `docker-compose` .
```bash
cd ../docker
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docker-compose -f docker-compose.middleware.yaml -p dify up -d
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cd ../api
```
2. Copy `.env.example` to `.env`
3. Generate a `SECRET_KEY` in the `.env` file.
```bash
openssl rand -base64 42
```
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3.5 If you use annaconda, create a new environment and activate it
```bash
conda create --name dify python=3.10
conda activate dify
```
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4. Install dependencies
```bash
pip install -r requirements.txt
```
5. Run migrate
Before the first launch, migrate the database to the latest version.
```bash
flask db upgrade
```
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⚠️ If you encounter problems with jieba, for example
```
> flask db upgrade
Error: While importing 'app', an ImportError was raised:
```
Please run the following command instead.
```
pip install -r requirements.txt --upgrade --force-reinstall
```
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6. Start backend:
```bash
flask run --host 0.0.0.0 --port=5001 --debug
```
7. Setup your application by visiting http://localhost:5001/console/api/setup or other apis...
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8. If you need to debug local async processing, you can run `celery -A app.celery worker -P gevent -c 1 --loglevel INFO -Q dataset,generation,mail` , celery can do dataset importing and other async tasks.
