Diet API

This is a dockerized rest API to compute nutritionally optimal diets

Inputs

It expects POST data containing

{
 "nfoods":6,
 "exclude_food_ids":[],
 "metric_nutrients":[208],
 "metric_weights":[1]
}

• nfoods: The maximum number of foods the solution diet can contain
• exclude_food_ids: foods to be excluded from all diets (by USDA food id)
• metric_nutrients: the nutrients to consider in optimization. by USDA nutrient ID (208 = calories)
• metric_weights: the multiplier for each metric_nutrients. The optimization (minimization) target is the weighted sum of all metric nutrients in the diet. For example setting metric_nutrients=[208] and metric_weights=[1] will minimize the total calories in the diet. Setting metric_weights=[-1] will maximize calories.

Outputs

The amount of each food in the diet (some values may be zero). For example,

{
 "food_amounts":[1.48297,0.07821,3.52415,0.12568,5.43694,7.93208],
 "food_ids":[17428,16124,43019,17195,11965,11281]
}

Environment

Docker container with gunicorn running a flask app.

Testing locally

Build the container:

docker build --tag find_diet:python .
docker run --rm -p 8080:8080 -e PORT=8080 find_diet:python

Hit the API with curl:

curl -i -H "Content-Type: application/json" -X POST -d @/tmp/json.txt http://localhost:8080/find_diet

Where /tmp/json.txt contains the inputs,

{
 "nfoods":6,
 "exclude_food_ids":[],
 "metric_nutrients":[208],
 "metric_weights":[1]
}

Deploy with Google cloud run

1. Set up a new project in GCP
2. Open cloud shell
3. Clone this repo to cloud shell: git clone https://github.com/semiformal-net/diet_api.git
4. cd diet_api
5. export GOOGLE_CLOUD_PROJECT=$(gcloud config get-value project)
6. docker build . -f Dockerfile -t "gcr.io/${GOOGLE_CLOUD_PROJECT}/diet_api:latest"
7. gcloud auth configure-docker
8. docker push "gcr.io/${GOOGLE_CLOUD_PROJECT}/diet_api:latest"
9. gcloud run deploy dietapi --region us-central1 --image gcr.io/${GOOGLE_CLOUD_PROJECT}/diet_api:latest (If prompted to enable various APIs on this project say yes)
10. Select yes to allow unauthenticated invocations
11. Note the url from gcloud run services describe dietapi --region us-central1 --format='value(status.url)'

Hit the API with curl:

curl -i -H "Content-Type: application/json" -X POST -d @/tmp/json.txt https://dietapi-jnb6dn7x6q-uc.a.run.app/find_diet