跟踪数据更改 - 审计日志 - 下篇 | InterSystems Developer Community

文章

Michael Lei · 六月 26, 2022 阅读大约需 5 分钟

#对象数据模型 #ObjectScript #Caché #InterSystems IRIS for Health

在前一篇文章中，我已经演示了一种简单的方法来记录数据的变化。在这个时候，我改变了负责记录审计数据的 "审计抽象类 "和记录审计日志的数据结构。

我已经将数据结构改为父子结构，其中将有两个表来记录 "交易 "和在该交易中改变的 "字段的值"。

看一下新的数据模型:

看看从 "审计类 "改变的代码吧:

Class Sample.AuditBase [ Abstract ]
{ Trigger SaveAuditAfter [ CodeMode = objectgenerator, Event = INSERT/UPDATE, Foreach = row/object, Order = 99999, Time = AFTER ]
{
#dim %compiledclass As %Dictionary.CompiledClass
#dim tProperty As %Dictionary.CompiledProperty
#dim tAudit As Sample.Audit Do %code.WriteLine($Char(9)_"; get username and ip adress")
Do %code.WriteLine($Char(9)_"Set tSC = $$$OK")
Do %code.WriteLine($Char(9)_"Set tUsername = $USERNAME") Set tKey = ""
Set tProperty = %compiledclass.Properties.GetNext(.tKey)
Set tClassName = %compiledclass.Name Do %code.WriteLine($Char(9)_"Try {")
Do %code.WriteLine($Char(9,9)_"; Check if the operation is an update - %oper = UPDATE")
Do %code.WriteLine($Char(9,9)_"if %oper = ""UPDATE"" { ")
Do %code.WriteLine($Char(9,9,9)_"Set tAudit = ##class(Sample.Audit).%New()")
Do %code.WriteLine($Char(9,9,9)_"Set tAudit.Date = +$Horolog")
Do %code.WriteLine($Char(9,9,9)_"Set tAudit.UserName = tUsername")
Do %code.WriteLine($Char(9,9,9)_"Set tAudit.ClassName = """_tClassName_"""")
Do %code.WriteLine($Char(9,9,9)_"Set tAudit.Id = {id}")
Do %code.WriteLine($Char(9,9,9)_"Set tSC = tAudit.%Save()")
do %code.WriteLine($Char(9,9,9)_"If $$$ISERR(tSC) $$$ThrowStatus(tSC)")
Do %code.WriteLine($Char(9,9,9)_"Set tAuditId = tAudit.%Id()") While tKey '= "" {
set tColumnNbr = $Get($$$EXTPROPsqlcolumnnumber($$$pEXT,%classname,tProperty.Name))
Set tColumnName = $Get($$$EXTPROPsqlcolumnname($$$pEXT,%classname,tProperty.Name)) If tColumnNbr '= "" { Do %code.WriteLine($Char(9,9,9)_";")
Do %code.WriteLine($Char(9,9,9)_";")
Do %code.WriteLine($Char(9,9,9)_"; Audit Field: "_tProperty.SqlFieldName)
Do %code.WriteLine($Char(9,9,9)_"if {" _ tProperty.SqlFieldName _ "*C} {") Do %code.WriteLine($Char(9,9,9,9)_"Set tAuditField = ##class(Sample.AuditField).%New()")
Do %code.WriteLine($Char(9,9,9,9)_"Set tAuditField.Field = """_tColumnName_"""")
Do %code.WriteLine($Char(9,9,9,9)_"Set tAuditField.OldValue = {"_tProperty.SqlFieldName_"*O}")
Do %code.WriteLine($Char(9,9,9,9)_"Set tAuditField.NewValue = {"_tProperty.SqlFieldName_"*N}")
Do %code.WriteLine($Char(9,9,9,9)_"Do tAuditField.AuditSetObjectId(tAuditId)")
Do %code.WriteLine($Char(9,9,9,9)_"Set tSC = tAuditField.%Save()")
do %code.WriteLine($Char(9,9,9,9)_"If $$$ISERR(tSC) $$$ThrowStatus(tSC)")
Do %code.WriteLine($Char(9,9,9)_"}")
}
Set tProperty = %compiledclass.Properties.GetNext(.tKey)
} Do %code.WriteLine($Char(9,9)_"}") Do %code.WriteLine($Char(9)_"} Catch (tException) {") Do %code.WriteLine($Char(9,9)_"Set %msg = tException.AsStatus()")
Do %code.WriteLine($Char(9,9)_"Set %ok = 0")
Do %code.WriteLine($Char(9)_"}") Set %ok = 1
} }

通过Test()类方法改变数据，现在你可以看到审计类（Sample.Audit）中的 "父记录 "和 "审计字段 "类中的 "子字段 "被改变。(Sample.AuditField)。

d ##class(Sample.Person).Test(1)
INSERT INTO Sample.Person (Name, Age) VALUES ('TEST PARENT-CHILD', '01')
SQLCODE: 0
ID Age Name
1 01 TEST PARENT-CHILD 1 Rows(s) Affected
UPDATE Sample.Person SET Name = 'INTERSYSTEMS DEVELOPER COMMUNITY', Age = '100' WHERE Name = 'TEST PARENT-CHILD'
SQLCODE:0
ID Age Name
1 100 INTERSYSTEMS DEVELOPER COMMUNITY 1 Rows(s) Affected

审计类:

注意Sample.AuditField记录通过Audit字段=1对Sample.Audit类进行了引用。你可以通过使用两个类的关系来查询数据，如下所示:

这样就搞定了。这样，我们有一个不同的审计日志数据结构。

Audit Sample Classes 2