我正在尝试将HighStock Stockchart配置为使用日期时间和值的二维数组。这种方法只在Highcharts文档中提到,而不是在highstock文档中提到。
我在我的视图助手文件中有一个方法:
def byusers_chart_series(name, byusers)
data = []
codes_by_user = byusers.where(:hpmuser => "#{name}").group("date(hpmcreated)").select("date(hpmcreated) as dater, count(globalcode) as codes")
codes_by_user.each do |record|
#x = [Date.UTC("#{record.dater.year.inspect.to_i}", "#{record.dater.day.inspect.to_i}", "#{record.dater.month.inspect.to_i}"), "#{record.codes.inspect.to_i}"]
x = [Date.UTC("#{record.dater.year.inspect.to_i}", "#{record.dater.day.inspect.to_i}", "#{record.dater.month.inspect.to_i}"), "#{record.codes.inspect.to_i}"]
data << Array(x)
end
data
end
这是返回的数组,正如我希望它出现在javascript:中一样
[[Date.UTC(2012, 1, 2), 1],
[Date.UTC(2012, 2, 2), 5],
[Date.UTC(2012, 3, 2), 15],
[Date.UTC(2012, 6, 2), 8],
[Date.UTC(2012, 7, 2), 3],
[Date.UTC(2012, 8, 2), 73],
[Date.UTC(2012, 9, 2), 77]]
这是html中的代码。ERB文件:
<script type="text/javascript" charset="UTF-8">
$(function() {
new Highcharts.StockChart({
chart : {
renderTo: 'weeks52dynamic',
borderColor: '#EBBA95',
borderWidth: 3
},
legend : {
align : "left",
enabled : true,
layout : "vertical",
verticalAlign : "top"
},
rangeSelector : {
selected : 0
},
title : {
text : 'title'
},
scrollbar: {
barBackgroundColor: 'gray',
barBorderRadius: 7,
barBorderWidth: 0,
buttonBackgroundColor: 'gray',
buttonBorderWidth: 0,
buttonBorderRadius: 7,
trackBackgroundColor: 'none',
trackBorderWidth: 1,
trackBorderRadius: 8,
trackBorderColor: '#CCC'
},
xAxis: {
title: {
text: "Date"
},
type: "datetime",
dateTimeLabelFormats: { // don't display the dummy year
month: '%e. %b',
year: '%b'
}
},
yAxis: {
min: 0,
title: {
text: "Number of Codes"
}
},
series: [
<% { "New Codes" => Newcode.codesperday }.each do |name, newcodes| %>
{
name: "<%= name %>",
pointInterval: <%= 1.day * 1000 %>,
pointStart: <%= 350.weeks.ago.to_i * 1000 %>,
data: <%= newcodes_chart_series(newcodes, 350.weeks.ago) %>,
marker : {
enabled : true,
radius: 3
}
},
<% end %>
<% { "User" => Newcode.byuser }.each do |name, byusers| %>
{
name: "<%= name %>",
data: <%= byusers_chart_series(name, byusers) %>,
marker : {
enabled : true,
radius: 3
}
}
<% end %>
]
});
});
</script>
我在浏览器中遇到的错误是,ERB模板试图评估Date.UTC函数,而不是将其传递给JavaScript。我的问题是,每当我在一个或多个数组中的Data.UTC周围加上任何引号时,引号都会出现在发送给JavaScript的最后一个数组中。
如何在不让ruby对其求值的情况下传递精确的数组?
让我们在修复它的同时让你的方法更简单。如果你发现自己有这样的代码:
foo = []
bar.each{ … foo << jim }
…那么你应该使用这个:
foo = bar.map{ … jim }
您的Ruby代码中有Date.UTC
,这需要Ruby在构建数组时运行此代码。我们将使用Enumerable#map
将您的codes_by_user
转换为字符串的数组,而不是创建数组数组:
def byusers_chart_series(name, byusers)
codes_by_user = byusers.where(:hpmuser => "#{name}").group("date(hpmcreated)").select("date(hpmcreated) as dater, count(globalcode) as codes")
codes_by_user.map do |record|
parts = %w[year month day].map{ |s| record.dater.send(s) }
"[Date.UTC(#{parts.join(',')}),#{record.codes}]"
end
end
然后在你看来:
data: [ <%= byusers_chart_series(name, byusers).join(", ") %> ],
这将在HTML中产生如下输出:
data: [ [Date.UTC(2011,10,7),42], [Date.UTC(2012,4,3),17] ],