variable substitution conflict between mako and Openlayers
I am using mako templates in pyramid which uses the ${} construct for variable substitution. I also use an Openlayers script to show a map with features. I want to style my features with Stylemap like so:
var symbol开发者_运维百科izer = OpenLayers.Util.applyDefaults(
{externalGraphic: "images/${thumbnail}.png", pointRadius: 20},
OpenLayers.Feature.Vector.style["default"]);
var styleMap = new OpenLayers.StyleMap({"default": symbolizer, "select": {pointRadius: 30}});
var vectorLayer = new OpenLayers.Layer.Vector("thumbs", {styleMap: styleMap});
...
vectorLayer.features[0].attributes.thumbnail="sight";
vectorLayer.features[1].attributes.thumbnail="bar";
See also The OpenLayers Styles Framework.
The problem I have is that mako interprets the Openlayers ${} variable as its own variable and I get a "NameError: Undefined" from the server. I have searched a while but could not find a solution.
The most concise solution I found was this:
- "images/$${}{thumbnail}.png"
For completeness, the ones in the post mentioned by tonio are:
- "images/<%text>${thumbnail}.png"
- "images/${"$"}{thumbnail}.png"
As far as I remember, you can use a double dollar sign to escape it:
"images/$${thumbnail}.png"
HTH,
EDIT: Huh, seems I was wrong, see https://groups.google.com/forum/#!topic/mako-discuss/g00Qq3_FNgg
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