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|
So basically, we refer to the `action` to fetch the next page, check at its `ouputs`, look at its `headers` and get the `x-ms-continuation-NextRowKey`. We then set the value of it in the `NextRowKey` iteration and use it to fetch the next page. Its actually quite easy but sometimes it can be hard to get the right syntax. I find this [Workflow definition functions reference documentation]('https://docs.microsoft.com/en-us/azure/logic-apps/workflow-definition-language-functions-reference') very handy.
## Complete Workflow definition
```json
{
"$connections": {
"value": {
"azuretables": {
"connectionId": "/subscriptions/9b4ed9c7-de20-49df-b301-d39322443140/resourceGroups/TradersmateBackend/providers/Microsoft.Web/connections/azuretables",
"connectionName": "azuretables",
"id": "/subscriptions/9b4ed9c7-de20-49df-b301-d39322443140/providers/Microsoft.Web/locations/westeurope/managedApis/azuretables"
},
"sql": {
"connectionId": "/subscriptions/9b4ed9c7-de20-49df-b301-d39322443140/resourceGroups/TradersmateBackend/providers/Microsoft.Web/connections/sql",
"connectionName": "sql",
"id": "/subscriptions/9b4ed9c7-de20-49df-b301-d39322443140/providers/Microsoft.Web/locations/westeurope/managedApis/sql"
}
}
},
"definition": {
"$schema": "https://schema.management.azure.com/providers/Microsoft.Logic/schemas/2016-06-01/workflowdefinition.json#",
"actions": {
"Init_first_run": {
"inputs": {
"variables": [
{
"name": "FirstRun",
"type": "Boolean",
"value": true
}
]
},
"runAfter": {},
"type": "InitializeVariable"
},
"Initialize_nextrowkey": {
"inputs": {
"variables": [
{
"name": "NextRowKey",
"type": "String",
"value": ""
}
]
},
"runAfter": {
"Init_first_run": [
"Succeeded"
]
},
"type": "InitializeVariable"
},
"Until": {
"actions": {
"Condition": {
"actions": {
"Get_first_page": {
"inputs": {
"host": {
"connection": {
"name": "@parameters('$connections')['azuretables']['connectionId']"
}
},
"method": "get",
"path": "/Tables/@{encodeURIComponent('yourTable')}/entities",
"queries": {
"$select": "PropA, PropB"
}
},
"runAfter": {
"Set_variable_3": [
"Succeeded"
]
},
"type": "ApiConnection"
},
"Set_variable_2": {
"inputs": {
"name": "NextRowKey",
"value": "@{actions('Get_first_page')?['outputs']?['headers']?['x-ms-continuation-NextRowKey']}"
},
"runAfter": {
"Get_first_page": [
"Succeeded"
]
},
"type": "SetVariable"
},
"Set_variable_3": {
"inputs": {
"name": "FirstRun",
"value": false
},
"runAfter": {},
"type": "SetVariable"
}
},
"else": {
"actions": {
"Get_next_page": {
"inputs": {
"host": {
"connection": {
"name": "@parameters('$connections')['azuretables']['connectionId']"
}
},
"method": "get",
"path": "/Tables/@{encodeURIComponent('userTrackedProducts')}/entities",
"queries": {
"$select": "PropA, PropB",
"NextRowKey": "@variables('NextRowKey')"
}
},
"runAfter": {},
"type": "ApiConnection"
},
"Set_variable": {
"inputs": {
"name": "NextRowKey",
"value": "@{actions('Get_next_page')?['outputs']?['headers']?['x-ms-continuation-NextRowKey']}"
},
"runAfter": {
"Get_next_page": [
"Succeeded"
]
},
"type": "SetVariable"
}
}
},
"expression": {
"and": [
{
"equals": [
"@variables('FirstRun')",
true
]
}
]
},
"runAfter": {},
"type": "If"
},
"For_each": {
"actions": {
"Insert_products": {
"inputs": {
"body": {
"PropA": "@items('For_each')['PropA']",
"PropB": "@items('For_each')?['PropB']"
},
"host": {
"connection": {
"name": "@parameters('$connections')['sql']['connectionId']"
}
},
"method": "post",
"path": "/datasets/default/tables/@{encodeURIComponent(encodeURIComponent('[dbo].[YourTable]'))}/items"
},
"runAfter": {},
"type": "ApiConnection"
}
},
"foreach": "@body('Parse_JSON_2')",
"runAfter": {
"Parse_JSON_2": [
"Succeeded"
]
},
"type": "Foreach"
},
"Parse_JSON_2": {
"inputs": {
"content": "@if(not(variables('FirstRun')), body('Get_next_page')?['value'], body('Get_first_page')?['value'])",
"schema": {
"items": {
"properties": {
"PropA": {
"type": "string"
},
"PropB": {
"type": "string"
}
},
"required": [
"odata.etag",
"PropA",
"PropB"
],
"type": "object"
},
"type": "array"
}
},
"runAfter": {
"Condition": [
"Succeeded"
]
},
"type": "ParseJson"
}
},
"expression": "@and(equals(variables('NextRowKey'), null), not(variables('FirstRun')))",
"limit": {
"count": 60,
"timeout": "PT1H"
},
"runAfter": {
"Initialize_nextrowkey": [
"Succeeded"
]
},
"type": "Until"
}
},
"contentVersion": "1.0.0.0",
"outputs": {},
"parameters": {
"$connections": {
"defaultValue": {},
"type": "Object"
}
},
"triggers": {
"manual": {
"inputs": {
"schema": {}
},
"kind": "Http",
"type": "Request"
}
}
}
}
|
The next part is to repeat the fetch records part until there are no more records or when its the first run. I use this expression to check wether to continue or not: `@and(equals(variables('NextRowKey'), null), not(variables('FirstRun')))`