無法將關鍵字“位置”解析為字段
[英]Cannot resolve keyword 'location' into field
問題描述
我安裝了 django 並且我想使用 leaflet 來顯示我的氣象站的 position。
我發現了很好的教程，我可以用示例腳本完成
但是，現在我想將該練習應用到我的項目中。 我有一個包含大約一百萬個度量的數據庫，我需要保留我的數據庫/表的結構。 我會盡力描述我的問題。
我的問題從這里開始（viewsets.py）和這里。 據我了解，“位置”與我的表的字段匹配，該字段應包含與此類似的值
'POINT(6.000251769184164 46.19337852885697)',0
因為字段的類型是 POINT。 但是，我的數據庫沒有這樣的字段。 相反，我有一個字段station_lat (float(8.6)) 和station_lng (float(8.6))，我在其中保存緯度和經度。 那就是為什么，我有錯誤，因為它找不到“位置”
無法將關鍵字“位置”解析為字段。 選項有：fields_id_field、fields_id_field_id、id_station、已安裝、map、sensors、station_active、station_alt、station_archive、station_created、station_description、station_lat、station_lng、station_longname、station_name、station_order、stations_types_id_stations_type、ttn_app_id、ttn
由於我必須使用我的數據庫來定義字段，並且由於“geo_field”是強制性的，所以我首先想知道，如果在我的serializerer.py 文件中，我可以調整“geo_field”來搜索“station_lat”字段和 'station_lng) 並將其轉換為以下格式
'POINT(6.000251769184164 46.19337852885697)',0
我想，我將在 viewsets.py 字段中解決類似的問題，但現在如果我評論該行，它不會產生錯誤。
我希望幾句話足以理解我的擔憂，因為我很絕望:(
非常感謝您提供給我的任何提示和提示或解決方案。
3 個解決方案
解決方案1
0 2022-08-13 23:30:20
您可以將location字段保留在 model Stations中，只需在save()方法中更改它以滿足 POINT 格式：
from django.contrib.gis.db.models import PointField
from django.contrib.gis.geos import Point
class Stations(models.Model):
...
location = PointField(blank=True, null=True, srid=4326)
station_lat = models.FloatField(blank=True, null=True)
station_lng = models.FloatField(blank=True, null=True)
...
class Meta:
managed = False
db_table = 'stations'
def save(self, *args, **kwargs):
self.location = Point(float(self.station_lng), float(self.station_lat))
super(Stations, self).save(*args, **kwargs)
解決方案2
0 2022-08-14 08:35:06
非常感謝，它真的更好，但事情進展順利:)。
我按照您的建議修改了我的模型文件。
- https://github.com/ecosensors/Django/blob/main/EcoSensors/console/map/models.py#L9和第10行
- https://github.com/ecosensors/Django/blob/main/EcoSensors/console/map/models.py#L275
- https://github.com/ecosensors/Django/blob/main/EcoSensors/console/map/models.py#L292
我需要在我的數據庫中創建一個字段“位置”
現在，這個https://github.com/ecosensors/Django/blob/main/EcoSensors/console/map/serializers.py#L24不會產生很大的錯誤！
然后當我加載我的頁面時，我可以看到正確的結構（見圖）
但是，如您所見，幾何條目是 null。 哪個（可能）有意義，因為在我的數據庫中，“位置”字段沒有值，並且具有 NULL 值。
save() 是否會更新“位置”字段？
我猜是！
我可以請你確認一下嗎
如果我必須在我的數據庫/表中創建一個歸檔的“位置”，save() 是否會更新字段“位置”。 如果是這種情況，“位置”字段是否會在每次刷新頁面時更新為相同的值？
非常感謝您的幫助，這幫助我領先一步 go。 （我是初學者）
周末愉快
解決方案3
0 2022-08-14 14:24:20
它有效，謝謝，除了一件事。 我必須創建字段“位置”。 我在創建該字段時遇到了問題，我按照那篇文章解決了它
我在 map 中只能看到一個標記，但實際上，所有標記都顯示出來了，但都在同一個位置。 這就是為什么我只看到一個標記的原因。
如果現在我查看序列化程序，它會返回給我
{
"type": "FeatureCollection",
"features": [
{
"id": 1,
"type": "Feature",
"geometry": {
"type": "Point",
"coordinates": [
6.000251769184164,
46.19337852885697
]
},
"properties": {
"station_name": "st-1",
"station_lat": 46.187164,
"station_lng": 5.997526
}
},
{
"id": 2,
"type": "Feature",
"geometry": {
"type": "Point",
"coordinates": [
6.000251769184164,
46.19337852885697
]
},
"properties": {
"station_name": "st-2",
"station_lat": 46.173527,
"station_lng": 6.003618
}
},
{
"id": 3,
"type": "Feature",
"geometry": {
"type": "Point",
"coordinates": [
6.000251769184164,
46.19337852885697
]
},
"properties": {
"station_name": "st-3",
"station_lat": 46.186268,
"station_lng": 5.997424
}
},
{
"id": 4,
"type": "Feature",
"geometry": {
"type": "Point",
"coordinates": [
6.000251769184164,
46.19337852885697
]
},
"properties": {
"station_name": "st-4",
"station_lat": 46.173153,
"station_lng": 6.003011
}
},
{
"id": 5,
"type": "Feature",
"geometry": {
"type": "Point",
"coordinates": [
6.000251769184164,
46.19337852885697
]
},
"properties": {
"station_name": "st-5",
"station_lat": 46.187016,
"station_lng": 5.997001
}
},
{
"id": 6,
"type": "Feature",
"geometry": {
"type": "Point",
"coordinates": [
6.000251769184164,
46.19337852885697
]
},
"properties": {
"station_name": "st-6",
"station_lat": 46.173393,
"station_lng": 6.004297
}
},
{
"id": 7,
"type": "Feature",
"geometry": {
"type": "Point",
"coordinates": [
6.000251769184164,
46.19337852885697
]
},
"properties": {
"station_name": "st-7",
"station_lat": 46.186146,
"station_lng": 5.997017
}
},
{
"id": 8,
"type": "Feature",
"geometry": {
"type": "Point",
"coordinates": [
6.000251769184164,
46.19337852885697
]
},
"properties": {
"station_name": "st-8",
"station_lat": 46.172722,
"station_lng": 6.00308
}
},
{
"id": 9,
"type": "Feature",
"geometry": {
"type": "Point",
"coordinates": [
6.000251769184164,
46.19337852885697
]
},
"properties": {
"station_name": "st-9",
"station_lat": 46.184677,
"station_lng": 5.997972
}
},
{
"id": 10,
"type": "Feature",
"geometry": {
"type": "Point",
"coordinates": [
6.000251769184164,
46.19337852885697
]
},
"properties": {
"station_name": "st-10",
"station_lat": 46.182545,
"station_lng": 5.999088
}
},
{
"id": 11,
"type": "Feature",
"geometry": {
"type": "Point",
"coordinates": [
6.000251769184164,
46.19337852885697
]
},
"properties": {
"station_name": "st-11",
"station_lat": 46.185596,
"station_lng": 5.996834
}
},
{
"id": 12,
"type": "Feature",
"geometry": {
"type": "Point",
"coordinates": [
6.000251769184164,
46.19337852885697
]
},
"properties": {
"station_name": "st-12",
"station_lat": 46.182682,
"station_lng": 6.003728
}
},
{
"id": 13,
"type": "Feature",
"geometry": {
"type": "Point",
"coordinates": [
6.000251769184164,
46.19337852885697
]
},
"properties": {
"station_name": "st-13",
"station_lat": 46.184441,
"station_lng": 5.999066
}
},
{
"id": 14,
"type": "Feature",
"geometry": {
"type": "Point",
"coordinates": [
6.000251769184164,
46.19337852885697
]
},
"properties": {
"station_name": "st-14",
"station_lat": 46.172466,
"station_lng": 6.00361
}
},
{
"id": 15,
"type": "Feature",
"geometry": {
"type": "Point",
"coordinates": [
6.000251769184164,
46.19337852885697
]
},
"properties": {
"station_name": "st-15",
"station_lat": 46.17223,
"station_lng": 6.002607
}
},
{
"id": 16,
"type": "Feature",
"geometry": {
"type": "Point",
"coordinates": [
6.000251769184164,
46.19337852885697
]
},
"properties": {
"station_name": "st-16",
"station_lat": 46.183529,
"station_lng": 6.006996
}
},
{
"id": 17,
"type": "Feature",
"geometry": {
"type": "Point",
"coordinates": [
6.000251769184164,
46.19337852885697
]
},
"properties": {
"station_name": "st-17",
"station_lat": 46.172356,
"station_lng": 6.004136
}
},
{
"id": 18,
"type": "Feature",
"geometry": {
"type": "Point",
"coordinates": [
6.000251769184164,
46.19337852885697
]
},
"properties": {
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"station_lat": 46.179119,
"station_lng": 6.004328
}
},
{
"id": 20,
"type": "Feature",
"geometry": {
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6.000251769184164,
46.19337852885697
]
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"properties": {
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"station_lat": 46.182545,
"station_lng": 5.999088
}
},
{
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"geometry": {
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"coordinates": [
6.000251769184164,
46.19337852885697
]
},
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"station_lng": 5.997623
}
},
{
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"type": "Feature",
"geometry": {
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6.000251769184164,
46.19337852885697
]
},
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}
},
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6.000251769184164,
46.19337852885697
]
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"station_lng": 5.998923
}
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{
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"geometry": {
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"coordinates": [
6.000251769184164,
46.19337852885697
]
},
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"station_name": "st-24",
"station_lat": 46.184345,
"station_lng": 5.998887
}
},
{
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"type": "Feature",
"geometry": {
"type": "Point",
"coordinates": [
6.000251769184164,
46.19337852885697
]
},
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}
},
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6.000251769184164,
46.19337852885697
]
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"properties": {
"station_name": "st-26",
"station_lat": 46.183361,
"station_lng": 6.006943
}
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{
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"geometry": {
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"coordinates": [
6.000251769184164,
46.19337852885697
]
},
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"station_name": "st-27",
"station_lat": 46.217918,
"station_lng": 6.016133
}
},
{
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"type": "Feature",
"geometry": {
"type": "Point",
"coordinates": [
6.000251769184164,
46.19337852885697
]
},
"properties": {
"station_name": "st-28",
"station_lat": 46.217934,
"station_lng": 6.014958
}
},
{
"id": 29,
"type": "Feature",
"geometry": {
"type": "Point",
"coordinates": [
6.000251769184164,
46.19337852885697
]
},
"properties": {
"station_name": "st-29",
"station_lat": 46.217575,
"station_lng": 6.01465
}
},
{
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"type": "Feature",
"geometry": {
"type": "Point",
"coordinates": [
6.000251769184164,
46.19337852885697
]
},
"properties": {
"station_name": "st-30",
"station_lat": 46.217575,
"station_lng": 6.01465
}
},
{
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"type": "Feature",
"geometry": {
"type": "Point",
"coordinates": [
6.000251769184164,
46.19337852885697
]
},
"properties": {
"station_name": "st-31",
"station_lat": 46.184528,
"station_lng": 5.999068
}
},
{
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"type": "Feature",
"geometry": {
"type": "Point",
"coordinates": [
6.000251769184164,
46.19337852885697
]
},
"properties": {
"station_name": "st-32",
"station_lat": 46.183529,
"station_lng": 6.006996
}
},
{
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"type": "Feature",
"geometry": {
"type": "Point",
"coordinates": [
6.000251769184164,
46.19337852885697
]
},
"properties": {
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"station_lat": 46.183769,
"station_lng": 6.007091
}
},
{
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"type": "Feature",
"geometry": {
"type": "Point",
"coordinates": [
6.000251769184164,
46.19337852885697
]
},
"properties": {
"station_name": "st-34",
"station_lat": 46.183132,
"station_lng": 6.006629
}
},
{
"id": 35,
"type": "Feature",
"geometry": {
"type": "Point",
"coordinates": [
6.000251769184164,
46.19337852885697
]
},
"properties": {
"station_name": "st-35",
"station_lat": 46.183407,
"station_lng": 6.006712
}
},
{
"id": 36,
"type": "Feature",
"geometry": {
"type": "Point",
"coordinates": [
6.000251769184164,
46.19337852885697
]
},
"properties": {
"station_name": "st-36",
"station_lat": 46.183582,
"station_lng": 6.006712
}
},
{
"id": 37,
"type": "Feature",
"geometry": {
"type": "Point",
"coordinates": [
6.000251769184164,
46.19337852885697
]
},
"properties": {
"station_name": "st-37",
"station_lat": 46.183762,
"station_lng": 6.006895
}
},
{
"id": 38,
"type": "Feature",
"geometry": {
"type": "Point",
"coordinates": [
6.000251769184164,
46.19337852885697
]
},
"properties": {
"station_name": "st-38",
"station_lat": 46.183144,
"station_lng": 6.006361
}
},
{
"id": 39,
"type": "Feature",
"geometry": {
"type": "Point",
"coordinates": [
6.000251769184164,
46.19337852885697
]
},
"properties": {
"station_name": "st-39",
"station_lat": 46.183449,
"station_lng": 6.006433
}
},
{
"id": 40,
"type": "Feature",
"geometry": {
"type": "Point",
"coordinates": [
6.000251769184164,
46.19337852885697
]
},
"properties": {
"station_name": "st-40",
"station_lat": 46.183567,
"station_lng": 6.006497
}
},
{
"id": 41,
"type": "Feature",
"geometry": {
"type": "Point",
"coordinates": [
6.000251769184164,
46.19337852885697
]
},
"properties": {
"station_name": "st-41",
"station_lat": 46.183796,
"station_lng": 6.006625
}
},
{
"id": 42,
"type": "Feature",
"geometry": {
"type": "Point",
"coordinates": [
6.000251769184164,
46.19337852885697
]
},
"properties": {
"station_name": "st-42",
"station_lat": 46.183132,
"station_lng": 6.007131
}
}
]
}
我們可以看到幾何，它總是具有相同的值
"geometry": {
"type": "Point",
"coordinates": [
6.000251769184164,
46.19337852885697
]
},
看起來“位置”字段沒有更新。 為什么？ 可能是，我不是很了解這里的這部分
def save(self, *args, **kwargs):
self.location = Point(float(self.station_lng), float(self.station_lat))
super(Stations, self).save(*args, **kwargs)
何時執行保存/更新？ 我應該運行./manager.py makemigrations和./manager.py migrate來更新“位置”字段嗎？
非常感謝！！！
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