grails - 如何解决休眠中节点错误的无数据类型

Question

我有 table 车，我写了如下查询

Vehicle.executeQuery("从车辆中选择音频系统")
但我收到一个错误

ERROR groovy.grails.web.errors.GrailsExceptionResolver ### No data type for node: org.hibernate.hql.ast.tree.IdentNode -[IDENT] IdentNode: 'audio_system' {originalText=audio_system}

java.lang.IllegalStateException: No data type for node: org.hibernate.hql.ast.tree.IdentNode -[IDENT] IdentNode: 'audio_system' {originalText=audio_system}

车辆类源代码如下

class Vehicle {


    String vehicleSticker
    String regNumber //plate
    String chasisNumber
    String engineNumber
    Integer yearOfManufacture
    Date purchasedOn

    Boolean audioSystem
    Boolean videoSystem
    Boolean mobileCharger
    Boolean laptopCharger

    //Vehicle compliance
    Date pucExpiry
    Date pucTestingOn
    Date taxTokenIssueDate
    Date taxTokenExpiryDate
    Date insuranceIssueDate
    Date insuranceExpiryDate
    Date permitIssueDate
    Date permitExpiryDate
    Date fitnessCertificateIssueDate
    Date fitnessCertificateExpiryDate
    Double odoReadingWhenServiceDone
    Double dueOddReading

    VendorRole vendor

    VehicleType vehicleType
    //RegistrationCertificate registrationCertificate

    static mapping = {
        //registrationCertificate(cascade:'all')

    }

    static constraints = {
        yearOfManufacture(nullable:true)
        regNumber(nullable:false,unique: true)
        chasisNumber(blank:true)
        engineNumber(blank:true)
        purchasedOn(nullable:true)
        taxTokenIssueDate(nullable:true)
        taxTokenExpiryDate(nullable:true)

        insuranceIssueDate(nullable:true)
        insuranceExpiryDate(nullable:true)
        permitIssueDate(nullable:true)
        permitExpiryDate(nullable:true)
        fitnessCertificateIssueDate(nullable:true)
        fitnessCertificateExpiryDate(nullable:true)
        odoReadingWhenServiceDone(nullable:true)

        dueOddReading(nullable:true)
        pucExpiry(nullable:true)
        pucTestingOn(nullable:true)

        vendor(nullable:true)


    }

    public String toString() {
        "${vehicleSticker} ${regNumber?'| '+ regNumber:''}"
    }

Answer 1

那应该是

Vehicle.executeQuery("select audioSystem from Vehicle ")

这是一个 HQL 查询，您使用类名和字段名，而不是表名和列名。