CODEWITHSUNDEEP
azure-logic-apps
granadaCoder
granadaCoder

Reputation: 27904

Logic Apps Blob overwriting file of same name

So I am posting the below JSON to a Logic App via a Http-Request-Trigger.

{
    "RequestMetaDataValue": {
        "RequestMetaDataUuid": "33333333-3333-3333-3333-333333333333"
    },
    "OtherStuff": [{
        "OtherStuffUuid": "11111111-1111-1111-1111-1111",
        "OtherStuffString": "peanut"
    },
    {
        "OtherStuffUuid": "e5dceac3-51cb-477b-b3a9-bd08f351cc0e",
        "OtherStuffString": "banana"
    }]
}

The Logic App parses the Json, so I can extract the RequestMetaDataUuid value. In this case "33333333-3333-3333-3333-333333333333".

I then use a Create Blob (action?) as seen here:

https://learn.microsoft.com/en-us/azure/connectors/connectors-create-api-azureblobstorage

And how it looks like in my Designer

enter image description here

So fairly straight forward.

Here's the issue.

If I resend the (same) Json, the blob/file gets overwritten in the blob.

For example, if I change

"OtherStuffUuid": "11111111-1111-1111-1111-1111",

to

"OtherStuffUuid": "aaaaaaaa-1111-1111-1111-1111",

The blob that originally had "OtherStuffUuid": "11111111-1111-1111-1111-1111" goes to never-never land. :(

If there anyway to prevent overwrite?

Is there anyway to check that the blob/file already exists (my preference) in the blob storage?

APPEND

Based on an answer, I tried to add the following pre-check.

enter image description here

Documentation here:

https://learn.microsoft.com/en-us/connectors/azureblob/#Get_Blob_Metadata_using_path

Get Blob Metadata using path Operation ID: GetFileMetadataByPath This operation retrieves blob metadata using path.

Required Parameters Blob path string Specify unique path to the blob Key: path

Returns Body BlobMetadata Blob metadata

Upvotes: 3

Views: 3693

Answers (1)

Szymon Wylezol
Szymon Wylezol

Reputation: 1466

You can use the 'Get Blob Metadata using path' action to check for existence of the blob. You can then can use a condition (based on the status code of the get blob metadata action result) to run actions depending on whether the blob already exists.

'Get Blob Metadata using path action'

Upvotes: 1

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