Skip to main content

Inserting Data with Azure Functions in CosmosDB


I was wondering how to use Azure Function to insert data in CosmosDB when this function receives an HTTP request
Surprise!!  It´s easy 

Step 1. Create your DataBase and Collection inside CosmosDB in Azure. 


Step 2. Create Function App




Step 3.  Create a new function. In this case use template "HttpTrigger - C#"



Step 4. Select "Integrate" option 


Be sure to change option in "Allowed HTTP methods" and select only "POST" HTTP method. 


Step 5. Create output binding



Step 6.  Configuring output binding


a:  Name of the entity variable to insert in CosmosDB.
b:  Name of the collection where the entity will be inserted (see image in Step 1).
c:  Partition Key  in case you need to define it. 
d:  DataBase name in Cosmos DB (see image in Step 1).
e:  ConnectionString.


Step 7.   "Short" programming....

a: Entity variable referenced in Step 6. a
b: Entity type (custom class). 

outputDocument= req.Content.ReadAsAsync<DTODocument>().Result;  

The function of this line is to read the body content in the request and deserialized it to the variable of DTODocument type.



Step 8. Testing 


a: Get Azure Function endpoint to invoque it from any programming language.
b: Request body example in JSON format (DTODocument)
c: Also you can test the function inside Azure Function App context.


See you late !!!

Comments

Popular posts from this blog

Update data in COSMOS DB with Azure Functions.

I was looking for a way to update COSMOS DB document after receive a  request inside Azure Function without any COSMOS DB biding. I didn't find a way !!  I took another way. I don't know if it is the right or wrong way. But this way works for me. Scenario is very simple. We have sales orders arriving into the data base. We have another Azure function to insert those new orders. But suppose we need to cancel some order. How to do that using Azure Function ? Let´s start !!! Step 1. Sample Collection. This collection is very simple,  we are focused on results. Step 2. Create a Function and Select HttpTrigger template.  Step 3. Code  More code.  Step 4. Test Step 5. Results  See you soon 

Some architectures with Cosmos DB and Azure Functions

Fig 1. Access Control Fig 2. Documents storage with reference to blob. Fig 3. Automatic storage maintenance of Documents with expiration. Fig 4. Reports.