Azure function 从 Azure 表存储中检索行

Question

trying to retrieve all rows from table storage my code is like this like in the documentation

using Microsoft.Azure.Cosmos.Table;
using Microsoft.Azure.WebJobs;
using Microsoft.Extensions.Logging;
using System.ComponentModel.DataAnnotations.Schema;
using System.Linq;

public class TableStorage
{
    public class MyPoco : TableEntity
    {
        public string Text { get; set; }
        public object PartitionKey { get; internal set; }
        public object RowKey { get; internal set; }
    }

    [FunctionName("TableInput")]
    public static void TableInput(
        [QueueTrigger("table-items")] string input,
        [Table("MyTable")] IQueryable<MyPoco> pocos,
        ILogger log)
    {
        foreach (MyPoco poco in pocos)
        {
            log.LogInformation($"PK={poco.PartitionKey}, RK={poco.RowKey}, Text={poco.Text}");
        }
    }
}

the error is: Severity Code Description Project File Line Suppression State Error CS0592 Attribute 'Table' is not valid on this declaration type. It is only valid on 'class' declarations.

What al I missing?

Answer 1

The TableAttribute is now resolved from System.ComponentModel.DataAnnotations.Schema instead of it being resolved from the correct location, which is Microsoft.Azure.WebJobs . See TableAttribute Class for the faulty attribute.

For this to work, please make sure you have the correct version (4.0.5) installed for NuGet package Microsoft.Azure.WebJobs.Extensions.Storage .

Version 5.0.0 removes the TableAttribute . I think it will come back in a Cosmos DB package, but haven't gotten around to finding out which one. Yet.

EDIT:
Using a table binding to an IQueryable is only supported in the Functions v1 runtime. If you are not running on the v1 runtime, you can either bind to an entire CloudTable , or to one specific item in the table by providing both partition key and row key in the binding.

Also: your POCO properties PartitionKey and RowKey hide the ones from TableEntity . If that's intentional, you might want to make that explicit by adding a new keyword.