94 lines
2.2 KiB
Markdown
94 lines
2.2 KiB
Markdown
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# 1. Purpose
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This specification describes an extension for
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[MapConfig 1.4.0](https://github.com/CartoDB/Windshaft/blob/master/doc/MapConfig-1.4.0.md) version.
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# 2. Changes over specification
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This extension targets layers with `sql` option, including layer types: `cartodb`, `mapnik`, and `torque`.
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It extends MapConfig with a new attribute: `analyses`.
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## 2.1 Analyses attribute
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The new analyses attribute must be an array of analyses as per [camshaft](https://github.com/CartoDB/camshaft). Each
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analysis must adhere to the [camshaft-reference](https://github.com/CartoDB/camshaft/blob/0.8.0/reference/versions/0.7.0/reference.json) specification.
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Each node can have an id that can be later references to consume the query from MapConfig's layers.
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Basic analyses example:
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```javascript
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[
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{
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// REQUIRED
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// string, `id` free identifier that can be reference from any layer
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"id": "HEAD",
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// REQUIRED
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// string, `type` camshaft's analysis type
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"type": "source",
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// REQUIRED
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// object, `params` will depend on `type`, check camshaft-reference for more information
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"params": {
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"query": "select * from your_table"
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}
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}
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]
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```
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# 2.2. Integration with layers
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As pointed before an analysis node id can be referenced from layers to consume its output query.
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The layer consuming the output must reference it with the following option:
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```
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{
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"options": {
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// REQUIRED
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// object, `source` as in the future we might want to have other source options
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"source": {
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// REQUIRED
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// string, `id` the analysis node identifier
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"id": "HEAD"
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}
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}
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}
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```
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## 2.3. Complete example
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```
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{
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"version": "1.4.0",
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"layers": [
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{
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"type": "cartodb",
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"options": {
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"source": {
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"id": "HEAD"
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},
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"cartocss": "...",
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"cartocss_version": "2.3.0"
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}
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}
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],
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"analyses": [
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{
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"id": "HEAD",
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"type": "source",
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"params": {
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"query": "select * from your_table"
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}
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}
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]
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}
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```
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# History
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## 1.0.0
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- Initial version
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