Question

我有以下提到的带有可选参数的方法：

customer_id

因此，当传递customer_id时，我想通过两个过滤条件来过滤表。而且，当未传递session.query( DivvyDbObjects.ResourceProperty.resource_id, DivvyDbObjects.ResourceProperty.name ).filter( ( (DivvyDbObjects.ResourceProperty.name=='customerid') & (DivvyDbObjects.ResourceProperty.value.isnot(None)) ), DivvyDbObjects.ResourceProperty.value==customer_id ).all()时，我只想按第一个过滤条件过滤表。

我还尝试使用AND，OR运算符来获得所需的结果，但似乎没有任何作用


@CommandLine.Command(name="myAp",
        synopsisSubcommandLabel = "", usageHelpWidth = 120,
        commandListHeading = "",
        customSynopsis =  "\n\nArguments for MyApp operation.\n"
                + "\n"
                + "Operations:\n"
                + "    create                 Create the stuff\n"
                + "    list                   List the stuff\n"
                + "    add                    Add things\n"
                + "        -r --type                  One or both of [Type1, Typ2]\n"
                + "        -a --annualCost            AnnualCost\n"
                + "        -n --number                Number of each type thing\n"
                + "    subtract               Subtract things\n"
                + "        -r --reasons               Combination of\n"
                + "                                        fiscal (fiscal reason)\n"
                + "                                        operational (operational reason\n"
                + "                                        other (other reason)\n"
                + "    -h      Display this help message and exit\n"
)
class PicoCliParser {
    // All of my other Parameters and options here

    @Option(names = { "-h", "--help" }, usageHelp = true, hidden = true)
    boolean helpRequested = false;

    public static void main(String[] args) throws Exception {
        PicoCliParser parser = new PicoCliParser();
        CommandLine cmd = new CommandLine(parser);
        try {
            CommandLine.ParseResult parseResult = cmd.parseArgs(args);
            System.err.println("parseResults: " + parseResult.matchedArgs().toString());
            if (cmd.isUsageHelpRequested()) {
                cmd.usage(System.out);
            }
        } catch (CommandLine.ParameterException e) {

        }

    }
}

我是SqlAlchemy的新手，需要帮助来解决此问题。谢谢！

Answer 1

解决这个问题的最简单方法是仅在customer_id不为空的情况下运行第二个过滤器方法：

def _customer_resources_details(customer_id=''):
    try:
        q = session.query(
            DbObjects.ResourceProperty.resource_id,
            DivvyDbObjects.ResourceProperty.name
        ).filter(DbObjects.ResourceProperty.name =='customerid')
        if customer_id:
            q = q.filter(DbObjects.ResourceProperty.value == customer_id)
        return q.all()
    except Exception as e:
        logger.error('_customer_resources_details ' + str(e))

SqlAlchemy / mysql可选Where子句

1 个答案: