Send Email with multiple attachment using Azure Logic App - azure

Question

I need to send the blobs uploaded to my Azure storage container as an attachments. Number of files getting uploaded to container will change so I need to use dynamic method for attachment.
I have verified this question related to it
I am using below logic:
Append to variable values
{
"Name": items('For_each')?['DisplayName']
"ContentBytes":body('Get_blob_content')
}
When I am trying to save the logic, getting below error:
Save logic app failed
Failed to save logic app testing. The template validation failed: 'The action(s) 'Get_blob_content' referenced by 'inputs' in action 'Append_to_array_variable' are not defined in the template.'.
How can I solve this ?

Answer 1

Based on the error message shared above, Instead of saving the entire workflow at once would suggest you to save the logic app at each stage or before the appendtoarray variable stage & post then append the values to attachment variable with previous stage outputs.
Based on the above requirement, we have created the below logic app in our local environment &tested it as well which is working fine.
In our workflow, We have Used For Each to loop the blobs from List Blobs action. Within For Each you can use Get blob content to get blob content, and then use Append to array variable to append attachments.
The expressions Name and ContentBytes are as follows:
"ContentBytes": "#base64(body('Get_blob_content_(V2)'))",
"Name": "#items('For_each')?['DisplayName']"
Here is the code view of the Logic app that we have created :
{
"definition": {
"$schema": "https://schema.management.azure.com/providers/Microsoft.Logic/schemas/2016-06-01/workflowdefinition.json#",
"actions": {
"For_each": {
"actions": {
"Append_to_array_variable": {
"inputs": {
"name": "attachments",
"value": {
"ContentBytes": "#base64(body('Get_blob_content_(V2)'))",
"Name": "#items('For_each')?['DisplayName']"
}
},
"runAfter": {
"Get_blob_content_(V2)": [
"Succeeded"
]
},
"type": "AppendToArrayVariable"
},
"Get_blob_content_(V2)": {
"inputs": {
"host": {
"connection": {
"name": "#parameters('$connections')['azureblob']['connectionId']"
}
},
"method": "get",
"path": "/v2/datasets/#{encodeURIComponent(encodeURIComponent('AccountNameFromSettings'))}/files/#{encodeURIComponent(encodeURIComponent(items('For_each')?['Path']))}/content",
"queries": {
"inferContentType": true
}
},
"runAfter": {},
"type": "ApiConnection"
}
},
"foreach": "#body('Lists_blobs_(V2)')?['value']",
"runAfter": {
"Initialize_variable": [
"Succeeded"
]
},
"type": "Foreach"
},
"Initialize_variable": {
"inputs": {
"variables": [
{
"name": "attachments",
"type": "array"
}
]
},
"runAfter": {
"Lists_blobs_(V2)": [
"Succeeded"
]
},
"type": "InitializeVariable"
},
"Lists_blobs_(V2)": {
"inputs": {
"host": {
"connection": {
"name": "#parameters('$connections')['azureblob']['connectionId']"
}
},
"method": "get",
"path": "/v2/datasets/#{encodeURIComponent(encodeURIComponent('AccountNameFromSettings'))}/foldersV2/#{encodeURIComponent(encodeURIComponent('JTJmcmVwb3J0cw=='))}",
"queries": {
"nextPageMarker": "",
"useFlatListing": false
}
},
"metadata": {
"JTJmcmVwb3J0cw==": "/reports"
},
"runAfter": {},
"type": "ApiConnection"
},
"Send_an_email_(V2)": {
"inputs": {
"body": {
"Attachments": "#variables('attachments')",
"Body": "<p>tested logic app flow successfully</p>",
"Subject": "blob test",
"To": "<username>#microsoft.com"
},
"host": {
"connection": {
"name": "#parameters('$connections')['office365']['connectionId']"
}
},
"method": "post",
"path": "/v2/Mail"
},
"runAfter": {
"For_each": [
"Succeeded"
]
},
"type": "ApiConnection"
}
},
"contentVersion": "1.0.0.0",
"outputs": {},
"parameters": {
"$connections": {
"defaultValue": {},
"type": "Object"
}
},
"triggers": {
"When_a_blob_is_added_or_modified_(properties_only)_(V2)": {
"evaluatedRecurrence": {
"frequency": "Minute",
"interval": 1
},
"inputs": {
"host": {
"connection": {
"name": "#parameters('$connections')['azureblob']['connectionId']"
}
},
"method": "get",
"path": "/v2/datasets/#{encodeURIComponent(encodeURIComponent('AccountNameFromSettings'))}/triggers/batch/onupdatedfile",
"queries": {
"checkBothCreatedAndModifiedDateTime": false,
"folderId": "JTJmcmVwb3J0cw==",
"maxFileCount": 10
}
},
"metadata": {
"JTJmcmVwb3J0cw==": "/reports"
},
"recurrence": {
"frequency": "Minute",
"interval": 1
},
"splitOn": "#triggerBody()",
"type": "ApiConnection"
}
}
},
"parameters": {
"$connections": {
"value": {
"azureblob": {
"connectionId": "/subscriptions/<sub-ID>/resourceGroups/<resourceGroup>/providers/Microsoft.Web/connections/azureblob",
"connectionName": "azureblob",
"id": "/subscriptions/<sub-id>/providers/Microsoft.Web/locations/eastus/managedApis/azureblob"
},
"office365": {
"connectionId": "/subscriptions/<sub-id>/resourceGroups/<resroucegroup>/providers/Microsoft.Web/connections/office365",
"connectionName": "office365",
"id": "/subscriptions/<sub-id>/providers/Microsoft.Web/locations/eastus/managedApis/office365"
}
}
}
}
}
Here is the sample Output for reference: