FastApiElasticSearch

Integration guide based on phind output

To create a FastAPI route that uses the AsyncElasticsearch client, we can use dependency injection to inject the client as a dependency. Here's how to do it:

First, we need to install the required libraries. We need the elasticsearch library for the Elasticsearch client and the fastapi library for the web framework. We can install them using pip:
```
pip install elasticsearch fastapi
```
Next, we need to create an instance of the AsyncElasticsearch client and add it as a dependency to our FastAPI app. Here's an example:
```
from fastapi import FastAPI, Depends
from elasticsearch import AsyncElasticsearch

app = FastAPI()

async def get_es_client():
    es_client = AsyncElasticsearch(hosts=["localhost"])
    yield es_client
    await es_client.close()

@app.get("/")
async def root(es_client: AsyncElasticsearch = Depends(get_es_client)):
    # Use the Elasticsearch client to perform a search
    result = await es_client.search(index="my-index", body={"query": {"match_all": {}}})
    return result
```
In this example, we define a function get_es_client that creates an instance of the AsyncElasticsearch client and yields it as a dependency. We also define a FastAPI route that depends on the Elasticsearch client. When the route is called, FastAPI will inject the Elasticsearch client as a dependency.

Note that we use the yield keyword instead of return in get_es_client. This is because we want to keep the Elasticsearch client open for the duration of the request. When the request is finished, FastAPI will call await es_client.close() to close the client.

We also specify the hosts parameter when creating the Elasticsearch client. This tells the client where to connect to. In this example, we connect to a local Elasticsearch instance.
To test the route, we can start the FastAPI app using uvicorn:
```
uvicorn main:app --reload
```
This will start the app and automatically reload it whenever we make changes to the code.
We can now make a request to the route using a web browser or a tool like curl. The response should be a JSON object containing the results of the Elasticsearch search.
```
$ curl http://localhost:8000/
{"took": 1, "timed_out": false, "_shards": {...}}
```
Note that we didn't specify the index or body parameters when calling the search method. This is because they are already specified in the route definition. If we want to perform a different search, we can modify the body parameter in the route definition.
```
@app.get("/")
async def root(es_client: AsyncElasticsearch = Depends(get_es_client)):
    # Use the Elasticsearch client to perform a search
    result = await es_client.search(index="my-other-index", body={"query": {"match_all": {}}})
    return result
```
This will perform a search on the my-other-index index instead of the my-index index.

KSriki/FastApiElasticSearch

FastApiElasticSearch