javascript–Google地图中的FusionTableLayer中忽略了“WHERE”子句

我正在尝试通过API将Google Fusion表格用作Google地图中的图层.只需使用FusionTableLayer()将图层添加到Google地图就行了.我可以看到地图和所有.当我尝试将过滤器(即“where子句”)应用于选择查询或样式部分时,“乐趣”开始.过滤器不起作用！它不会抛出任何错误.地图继续工作.但是结果集不会被过滤掉 – 好像where子句甚至不存在.用于“样式”部分的“where”子句的相同症状.它完全被忽略了.我有三种不同的样式,我想根据过滤条件应用它.所有这些都被忽略了.奇怪的是,样式块中列出的最后一个样式部分将应用于融合表层中的所有要素.我通过切换部分来验证它.我尝试用“col10”之类的引用替换实际的字段名称,但这没有任何区别.

我错过了什么？如何在FusionTableLayer中“启用”WHERE子句的使用,以便它们既可以在Select查询中应用,也可以在Styles部分中应用？

注意：在下面的代码段中,为此帖子插入了(//)注释.我正在开发的实际页面/代码中不存在这些注释.

layer = new google.maps.FusionTablesLayer({
map: map,
heatmap: { enabled: false },
query: {
select: "col11",
from: "1D6d93-0iT2zUCw8IvkbpDPYDx2-jA0ZAWXi07mQD",
//the following filter in select query does not work!
//I replaced col10 with actual field name (shift_id) but still EVERYTHING from the table is returned
where: "col10 <= 3"
},
styles: [{
//this where clause has no effect. I've tried replacing shift_id with col10.
where: "((shift_id != 1) AND (shift_id != 2))",
polylineOptions: {
strokeColor: "#FFFFFF",
strokeWeight: "3" }
}, {
//this where clause has no effect. I've tried replacing shift_id with col10.
where: "shift_id == 1",
polylineOptions: {
strokeColor: "#FF0000",
strokeWeight: "3" }
}, {
//this where clause has no effect. I've tried replacing shift_id with col10.
//whichever of these three blocks is listed last is the one that gets applied to the layer.
where: "shift_id == 2",
polylineOptions: {
strokeColor: "#ffbf00",
strokeWeight: "3" }
}]
});


解决方法:

>“==”不起作用,使用“=”
>不要在主查询中包含where

layer = new google.maps.FusionTablesLayer({
map: map,
heatmap: {
enabled: false
},
query: {
select: "geometry",
from: "1D6d93-0iT2zUCw8IvkbpDPYDx2-jA0ZAWXi07mQD",
},
styles: [{
where: "((SHIFT_ID != 1) AND (SHIFT_ID != 2))",
polylineOptions: {
strokeColor: "#FFFFFF",
strokeWeight: "3"
}
}, {
where: "SHIFT_ID = 1",
polylineOptions: {
strokeColor: "#FF0000",
strokeWeight: "3"
}
}, {
where: "SHIFT_ID = 2",
polylineOptions: {
strokeColor: "#ffbf00",
strokeWeight: "3"
}
}]
});


proof of concept fiddle

代码段：

var geocoder = new google.maps.Geocoder();
var map;
function initialize() {
var map = new google.maps.Map(
document.getElementById("map_canvas"), {
center: new google.maps.LatLng(37.4419, -122.1419),
zoom: 13,
mapTypeId: google.maps.MapTypeId.ROADMAP
});
layer = new google.maps.FusionTablesLayer({
map: map,
heatmap: {
enabled: false
},
query: {
select: "geometry",
from: "1D6d93-0iT2zUCw8IvkbpDPYDx2-jA0ZAWXi07mQD",
},
styles: [{
where: "((SHIFT_ID != 1) AND (SHIFT_ID != 2))",
polylineOptions: {
strokeColor: "#FFFFFF",
strokeWeight: "3"
}
}, {
where: "SHIFT_ID = 1",
polylineOptions: {
strokeColor: "#FF0000",
strokeWeight: "3"
}
}, {
where: "SHIFT_ID = 2",
polylineOptions: {
strokeColor: "#ffbf00",
strokeWeight: "3"
}
}]
});
geocoder.geocode({
'address': "Winnipeg, Canada"
}, function(results, status) {
if (status === google.maps.GeocoderStatus.OK) {
map.fitBounds(results[0].geometry.viewport);
} else {
alert('Geocode was not successful for the following reason: ' + status);
}
});
}
google.maps.event.addDomListener(window, "load", initialize);

html,
body,
#map_canvas {
height: 100%;
width: 100%;
margin: 0px;
padding: 0px
}