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PORender as GeoJSON (or selectively as WKT/WKB) using MIME-Types
 

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  1. PORender as GeoJSON (or selectively as WKT/WKB) using MIME-Types
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    <p>I have Rails with <code>PostGIS</code>, <code>activerecord-postgis-adapter</code> and <code>rgeo-geojson</code> running.</p> <p>At the moment I can use default "object.json" URLs to get a JSON string with WKT/WKB format. It looks like this:</p> <pre><code>{"description":null,"id":1,"position":"POINT (10.0 47.0)"} </code></pre> <p>But now I want to have a custom MIME-Type, so I can call "object.geojson" to get GeoJSON format like this:</p> <pre><code>{"description":null,"id":1,"position":{"type":"Point","coordinates": [10.0, 47.0]}} </code></pre> <p>The only way I found to set the JSON-encoder to GeoJSON was to set it globally using <code>RGeo::ActiveRecord::GeometryMixin.set_json_generator(:geojson)</code> and <code>RGeo::ActiveRecord::GeometryMixin.set_json_generator(:wkt)</code>. <strong>But I just want to set it locally, is this possible?</strong></p> <p>I already added <code>Mime::Type.register "application/json", :geojson, %w( text/x-json application/jsonrequest )</code> to <code>mime_types.rb</code> and it works fine: I can use this code in my controller:</p> <pre><code>respond_to do |format| format.json { render json: @object } format.geojson { render text: "test" } end </code></pre> <p>I hope someone can tell me how to render some specific object to GeoJSON without setting the global JSON renderer to <code>:geojson</code>. !?</p> <p><strong>EDIT:</strong></p> <p>My objects look like this in Rails Console:</p> <p><code>#&lt;Anchor id: 1, description: nil, position: #&lt;RGeo::Geos::CAPIPointImpl:0x3fc93970aac0 "POINT (10.0 47.0)"&gt;&gt;</code></p>
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    1. USBenjamin M
    1. USBenjamin M
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    1. COGeoJSON is JSON and its proper media type is "application/json." Perhaps consider a completely different view for the GeoJSON data?
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      1. USsgillies
    2. COThanks for your answer: But there's still the question: How can I generate JSON with GeoJSON instead of WKT without(!!) setting the global json_generator?
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      1. USBenjamin M
 

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