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在客户 loopback.io 项目中,我需要跟踪/审核并提供撤消/重做功能,我发现最好的方法是 SCD 方法。

我在这里找到了一些东西:https ://en.wikipedia.org/wiki/Slowly_changeing_dimension然后我创建了这个模型:

SCD模型

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CREATE VIEW vw_trackedinvoice AS
    SELECT 
        ivp.id AS id,
        ivp.code AS code,
        ivp.idCustomer AS idCustomer,
        trk.id AS trkid,
        trk.idSession AS idSession,
        trk.isCurrent AS isCurrent,
        trk.tableName AS tableName,
        trk.tableCode AS tableCode,
        trk.tableId AS tableId,
        trk.dtIni AS dtIni,
        trk.dtEnd AS dtEnd,
        trk.dtDel AS dtDel
    FROM
        (invoiceversionprovider ivp
        JOIN scdtrack trk ON ((ivp.idscd = trk.id)))
    WHERE
        (trk.tableName = 'invoiceversionprovider');
-------------------------------------------------
CREATE VIEW vw_trackedinvoicedetail AS
    SELECT 
        idp.id AS id,
        idp.code AS code,
        idp.codeInvoice AS codeInvoice,
        idp.idProduct AS idProduct,
        idp.qtd AS qtd,
        trk.id AS trkid,
        trk.idSession AS idSession,
        trk.isCurrent AS isCurrent,
        trk.tableName AS tableName,
        trk.tableCode AS tableCode,
        trk.tableId AS tableId,
        trk.dtIni AS dtIni,
        trk.dtEnd AS dtEnd,
        trk.dtDel AS dtDel
    FROM
        (invoicedetailversionprovider idp
        JOIN scdtrack trk ON ((idp.idscd = trk.id)))
    WHERE
        (trk.tableName = 'invoicedetailversionprovider');
-------------------------------------------------
CREATE VIEW vw_currentinvoice AS
    SELECT 
        trki.id AS id,
        trki.code AS code,
        trki.idCustomer AS idCustomer,
        trki.trkid AS trkid
    FROM
        vw_trackedinvoice trki
    WHERE
        ((trki.isCurrent = 1)
            AND ISNULL(trki.dtDel));
-------------------------------------------------
CREATE VIEW vw_currentinvoicedetail AS
    SELECT 
        trkid.id AS id,
        trkid.code AS code,
        trkid.codeInvoice AS codeInvoice,
        trkid.idProduct AS idProduct,
        trkid.qtd AS qtd,
        trkid.trkid AS trkid
    FROM
        vw_trackedinvoicedetail trkid
    WHERE
        ((trkid.isCurrent = 1)
            AND ISNULL(trkid.dtDel));
-------------------------------------------------

有一些更好的正式模式来做吗?

我对SCD真的很陌生,希望有更多经验的人能看到它。

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