我有一个带有自定义 API 的 Azure 移动服务，它似乎正在进行多个 SQL 调用。当我查看日志时，我看到 SP 返回了多个响应。其中一些是空返回(无记录集)，而其中之一与 SP 正确通信并返回记录集。
我知道我的 iOS 应用程序仅调用自定义 API 一次。
这是自定义 API:
exports.post = function(request, response) {
var mssql = request.service.mssql;
var params = [request.query.FirstName ,
request.query.LastName ,
request.query.DOB ,
request.query.EmailAddress ,
request.query.PhoneNumber ,
request.query.FacilityID ,
request.query.DiagnosisID,
request.query.GeneratedBy ,
request.query.UserTypeID];
console.log("processregistration params = '%j'", params);
var sql = "exec MyStoredProcName ?, ?, ?, ?, ?, ?, ?, ?, ?";
mssql.query(sql, params, {
success: function(results) {
console.log("results = '%j'", results);
// I had to put this in there to keep it from returning an empty recordset
// back to my iOS app
if (results.length > 0) {
response.send(statusCodes.OK, results);
}
}
});
};
这是日志:
我知道 SP 只生成一个记录集，并且测试它直接生成一个记录集。我已经能够创可贴，但在 response.send 之前添加了一个 if 语句。我以前从未这样做过。有任何想法吗？
编辑 - 这是我的 SP(为 carlosfigueira 发布)
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
/*
==========================================================================================
Author: LJ Wilson
Create date: 2013-12-07
Description: Processes a new (or existing) user registration
==========================================================================================
Revision History
Date Initials Comments
2013-12-07 LJW Created
2013-12-18 LJW Fixed issue with InvitationCodeID
*/
ALTER PROCEDURE [MyApp].[sp_Process_Registration]
@FirstName VARCHAR(500) ,
@LastName VARCHAR(500) ,
@DOB DATETIME ,
@EmailAddress VARCHAR(500) ,
@PhoneNumber VARCHAR(25) ,
@FacilityID INT ,
@DiagnosisID INT ,
@GeneratedBy NVARCHAR(500) ,
@UserTypeID INT
AS
DECLARE @Timestamp AS DATETIME = CURRENT_TIMESTAMP
DECLARE @ExistingUserID AS INT = ( SELECT ID
FROM MyApp.Users
WHERE UserTypeID = @UserTypeID
AND EmailAddress = @EmailAddress
AND LastName = @LastName
)
DECLARE @EmailAddressInUse AS INT = ( SELECT COUNT(ID)
FROM MyApp.Users
WHERE EmailAddress = @EmailAddress
)
IF @ExistingUserID IS NULL
BEGIN
BEGIN TRAN
INSERT INTO MyApp.Users
( LoginName ,
FriendlyName ,
JoinDate ,
PhoneNumber ,
EmailAddress ,
UserTypeID ,
IsActive ,
FacilitiesListID ,
AllowTexting ,
AllowEmail ,
AllowCalls ,
AllowAPNS ,
ImagePath ,
ShowImage ,
LastUpdatedBy ,
LastUpdatedOn ,
FirstName ,
LastName ,
DOB
)
VALUES ( @EmailAddress , -- LoginName - nvarchar(250)
NULL , -- FriendlyName - nvarchar(500)
@Timestamp , -- JoinDate - datetime
@PhoneNumber , -- PhoneNumber - nvarchar(50)
@EmailAddress , -- EmailAddress - nvarchar(500)
@UserTypeID , -- UserTypeID - smallint
1 , -- IsActive - bit
NULL , -- FacilitiesListID - int
NULL , -- AllowTexting - bit
1 , -- AllowEmail - bit
NULL , -- AllowCalls - bit
1 , -- AllowAPNS - bit
NULL , -- ImagePath - nvarchar(1000)
NULL , -- ShowImage - bit
@GeneratedBy , -- LastUpdatedBy - nvarchar(500)
@TimeStamp , -- LastUpdatedOn - datetime
@FirstName , -- FirstName - varchar(500)
@LastName , -- LastName - varchar(500)
@DOB -- DOB - datetime
)
COMMIT TRAN
SET @ExistingUserID = ( SELECT @@IDENTITY
)
END
BEGIN
DECLARE @InvitationCode AS VARCHAR(50) = ( SELECT dbo.fnc_GenInvitationCode(@EmailAddress,
@FacilityID,
@DiagnosisID)
)
INSERT INTO MyApp.InvitationCodes
( InvitationCode ,
UserID ,
FacilityID ,
InvitationGeneratedOn ,
GeneratedBy ,
DiagnosisIdentifier ,
InvitationActive
)
VALUES ( @InvitationCode , -- InvitationCode - nvarchar(50)
@ExistingUserID , -- UserID - int
@FacilityID , -- FacilityID - int
@Timestamp , -- InvitationGeneratedOn - datetime
@GeneratedBy , -- GeneratedBy - nvarchar(500)
@DiagnosisID , -- DiagnosisIdentifier - int
NULL -- InvitationActive - bit
)
END
DECLARE @InvitationCodeID AS INT = ( SELECT ID
FROM MyApp.InvitationCodes
WHERE InvitationCode = @InvitationCode
AND InvitationGeneratedOn = @Timestamp
)
INSERT INTO MyApp.FacilitiesList
( UserID ,
InvitationCodeID ,
FacilityID ,
AddedOn ,
AddedBy
)
VALUES ( @ExistingUserID , -- UserID - int
@InvitationCodeID , -- InvitationCodeID - int
@FacilityID , -- FacilityID - int
@Timestamp , -- AddedOn - datetime
@GeneratedBy -- AddedBy - nvarchar(500)
)
SELECT @InvitationCode AS InvitationCode ,
@EmailAddressInUse AS EmailAddressInUse ,
@ExistingUserID AS ExistingUserID
GO
最佳答案
您遇到的问题是您的存储过程正在执行大量中间操作(查询现有用户 ID、查询正在使用的电子邮件地址等)，并且默认情况下所有这些操作都返回为SQL 服务器的结果集，这就是为什么您在“真实”结果集之前看到那些空结果集的原因。
您可以在存储过程中使用SET NOCOUNT ON语句，这将有效地从返回到mssql.query<的结果集列表中删除那些中间SQL执行。/ 功能。你的 SPROC 看起来像这样
ALTER PROCEDURE [carlosfigueira].[sp_Process_Registration]
@FirstName VARCHAR(500) ,
@LastName VARCHAR(500) ,
@DOB DATETIME ,
@EmailAddress VARCHAR(500) ,
@PhoneNumber VARCHAR(25) ,
@FacilityID INT ,
@DiagnosisID INT ,
@GeneratedBy NVARCHAR(500) ,
@UserTypeID INT
AS
SET NOCOUNT ON
DECLARE @Timestamp AS DATETIME = CURRENT_TIMESTAMP
-- rest of the stored proc code is the same
添加该语句后，传递给 mssql.query 的回调将仅被调用一次。
关于ios - Azure 移动服务自定义 API 多次调用 SQL SP，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/20726274/