需要幫助基於域和查找表創建Grails executeQuery

Question

我有兩個類：示例和參數。我也有一個sample_sample_parameter查找表，它存在以保存樣本ID和參數ID。這是映射在我的Grails應用程序。

我能寫，在松鼠工作的SQL查詢：

select s.* from sample s, sample_sample_parameters sp where s.id = sp.sample_id and sp.sample_parameter_id = 41 

，其中41將與從GSP頁面傳遞到操作的parameter.id變量代替。我也嘗試過使用executeQuery，但它告訴我樣本沒有被映射。

如何將此查詢轉換爲格式可識別的格式？

class Sample { 


Date collectionDate // date the sample was collected 
Date sampleReceivedDate // date the sample arrived on site 
Date dateCreated 
String sampleComments // details about the sample 
String labAccessionID // internal reference 
String sampleGender // is it from a male or female? 
String sampleAge // the age of the animal the sample was taken from 
String sampleBreed // the breed of animal 
String sampleNameID // patient name 
String filepath 

String enteredby 


String sg 
String mosm 

static searchable = true 


static hasMany =[sampleParameters:SampleParameter, ficsruns:Ficsrun]//[tags:Tag]// a Sample can have many parameters 
/* mappedBy allows two tables share a common table. It creates two join tables, one for each. 
* SampleParameter is the table being shared by Sample and SampleType tables */ 
static mappedBy=[sampleParameters:"samples"]//[tags:"domainClass1s"]/*http://www.van-porten.de/2010/09/multiple-many-to-many-in-grails/*/ 
static belongsTo = [sampleType:SampleType, labFinding:LabFinding, sampleSource:SampleSource, species:SpeciesList] // creates dependencies 


static constraints = { 

    sampleType(blank:false) 
    sampleNameID(blank:false) 
    collectionDate(blank:false) 
    sampleReceivedDate(blank:false) 
    sampleComments(nullable:true, maxSize:1000) 
    labAccessionID(nullable:true) 
    sampleGender(blank:false, inList:["M","F","NM","SF", "UNK"]) 
    sampleAge(nullable: true) 
    sampleBreed(nullable:true) 
    sampleSource(blank:false) 
    species(blank:false) 
    labFinding(nullable:true) 
    filepath(nullable:true) 
    enteredby(nullable:true) 
    sg(nullable:true) 
    mosm(nullable:true) 
    dateCreated() 
} 

/* This section is for static mapping to the hematology database*/ 
    static mapping = { 
    version false 
    id generator:'sequence', params:[sequence:'SHARED_SEQ'] 
    } 

    String toString(){ 
    "${sampleNameID}" 
    } 
} 


class SampleParameter implements Comparable{ 


String name 
String value 

static hasMany = [ 
samples:Sample,   //domainClass1s: DomainClass1, 
sampleTypes:SampleType //domainClass2s: DomainClass2 
] 
static mapping = { 
    version false 
    id generator:'sequence', params:[sequence:'SHARED_SEQ'] 
} 

    static mappedBy =  [samples:"sampleParameters",sampleTypes:"sampleParameters"]//[domainClass1s: "tags", domainClass2s: "tags"] 
    static belongsTo =[Sample,SampleType] //[DomainClass1, DomainClass2] 

    static constraints = { 
    name(blank:false) 
    //value() 
    //value(unique:true) 
    value (unique: 'name') 
} 

@Override public String toString() { 
return name + " " + value 
} 

@Override 
public int compareTo(Object o) { 
    if (o == null || this == null) { 
     return 0; 
    } else { 
     return value.compareTo(o.value) 
    } 
} 
} 

Answer 1

作爲第一個建議，當您有參數ID時，請執行以下操作。

Parameter p = Parameter.get(params.id) // or wherever your id is stored 
List<Sample> samples = Sample.findAllByParameter(p) // this assumes, the parameter property is actually named 'parameter' 

當然，現在沒有錯誤處理，但您會明白。

歡迎來到GORM，歡迎來到Grails。

Answer 2

問題是你沒有在你的executeQuery方法中使用HQL查詢。相反，您使用的是原生sql。從手冊：

The executeQuery method allows the execution of arbitrary HQL queries.

看看在specification看到這樣做的方式。順便說一下，它比原生SQL更容易。

Answer 3

List<Sample> samples = Sample.findAllBySampleParameter(SampleParameter.get(variable)) 

試試看吧？