首页 \ 问答 \ ORMLite自身的一对多关系(ORMLite one-to-many relationship of itself)

ORMLite自身的一对多关系(ORMLite one-to-many relationship of itself)

 我有一个与自身有一对多关系的模型。 每次我运行我的Android应用程序时，我都会收到一个SQLException ，它声明我的外部集合类Route为我的字段childRoutes column-name不包含类Route的外部字段。 我觉得我已经在我的模型中指定了这个，但我可能会遗漏一些东西？ 
 

 这是我的模型，不包括getter / setter： 
 

public class Route implements Serializable{

@DatabaseField(id = true, canBeNull = false, columnName = "id")
private long id;

@DatabaseField(columnName = "parent", foreign = true)
private Route parent;

@ForeignCollectionField
private ForeignCollection<Route> childRoutes;

}

 

 我在这里遵循了这个问题，但我似乎仍然无法做到正确。 ORMLITE一对多递归关系 

I have a model that has a one-to-many relationship of itself. Every time I run my android application, I keep getting an SQLException that states that my Foreign Collection class Route for my field childRoutes column-name does not contain a foreign field of class Route. I feel like I specified this already in my Model but I may be missing something?
 

Here is my model excluding the getters/setters:
 

public class Route implements Serializable{

@DatabaseField(id = true, canBeNull = false, columnName = "id")
private long id;

@DatabaseField(columnName = "parent", foreign = true)
private Route parent;

@ForeignCollectionField
private ForeignCollection<Route> childRoutes;

}

 

I followed this question here but I still can't seem to be getting it right. ORMLITE one-to-many recursive relationship

原文：https://stackoverflow.com/questions/31375916
更新时间：2022-08-21 21:08

最满意答案

 




var map; var geocoder; var address;



function initialize() { map = new GMap2(document.getElementById("map_canvas")); map.setCenter(new GLatLng(40.730885,-73.997383), 15); map.addControl(new GLargeMapControl); GEvent.addListener(map, "click", getAddress); geocoder = new GClientGeocoder(); }



function getAddress(overlay, latlng) { if (latlng != null) { address = latlng; geocoder.getLocations(latlng, showAddress); } }



function showAddress(response) { map.clearOverlays(); if (!response || response.Status.code != 200) { alert("Status Code:" + response.Status.code); } else { place = response.Placemark[0]; point = new GLatLng(place.Point.coordinates[1],place.Point.coordinates[0]); marker = new GMarker(point); map.addOverlay(marker); marker.openInfoWindowHtml( '>b<orig latlng:>/b<' + response.name + '>br/<' + '>b<latlng:>/b<' + place.Point.coordinates[1] + "," + place.Point.coordinates[0] + '>br<' + '>b<Status Code:>/b<' + response.Status.code + '>br<' + '>b<Status Request:>/b<' + response.Status.request + '>br<' + '>b<Address:>/b<' + place.address + '>br<' + '>b<Accuracy:>/b<' + place.AddressDetails.Accuracy + '>br>' + '>b>Country code:>/b< ' + place.AddressDetails.Country.CountryNameCode); } }



 


 




var map;
var geocoder;
var address;



function initialize() {
  map = new GMap2(document.getElementById("map_canvas"));
  map.setCenter(new GLatLng(40.730885,-73.997383), 15);
  map.addControl(new GLargeMapControl);
  GEvent.addListener(map, "click", getAddress);
  geocoder = new GClientGeocoder();
}



function getAddress(overlay, latlng) {
  if (latlng != null) {
    address = latlng;
    geocoder.getLocations(latlng, showAddress);
  }
}



function showAddress(response) {
  map.clearOverlays();
  if (!response || response.Status.code != 200) {
    alert("Status Code:" + response.Status.code);
  } else {
    place = response.Placemark[0];
    point = new GLatLng(place.Point.coordinates[1],place.Point.coordinates[0]);
    marker = new GMarker(point);
    map.addOverlay(marker);
    marker.openInfoWindowHtml(
        '>b<orig latlng:>/b<' + response.name + '>br/<' + 
        '>b<latlng:>/b<' + place.Point.coordinates[1] + "," + place.Point.coordinates[0] + '>br<' +
        '>b<Status Code:>/b<' + response.Status.code + '>br<' +
        '>b<Status Request:>/b<' + response.Status.request + '>br<' +
        '>b<Address:>/b<' + place.address + '>br<' +
        '>b<Accuracy:>/b<' + place.AddressDetails.Accuracy + '>br>' +
        '>b>Country code:>/b< ' + place.AddressDetails.Country.CountryNameCode);
  }
}

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