| 1 | Most.js source for a `map` function in a view
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| 2 | ---------
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| 3 |
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| 4 | Maps results from a changes stream into a view
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| 5 |
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| 6 | The view is evaluated locally (since CouchDB does not support `changes` on views).
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| 7 |
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| 8 | The `db_changes` stream is generated by e.g. `all_changes`.
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| 9 |
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| 10 | changes_view = (map_function,db_changes) ->
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| 11 | db_changes
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| 12 | .chain ({doc}) ->
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| 13 |
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| 14 | create (add,end,error) ->
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| 15 |
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| 16 | Emulate a row as reported without `include_docs`, similarly to what `view_as_stream` does.
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| 17 |
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| 18 | emit = (key,value) ->
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| 19 | add {id:doc._id,key,value}
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| 20 |
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| 21 | fn = map_function emit
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| 22 |
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| 23 | try
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| 24 | fn doc
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| 25 | catch e
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| 26 | error e
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| 27 | end()
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| 28 | return
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| 29 |
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| 30 | {create} = require '@most/create'
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| 31 | module.exports = changes_view
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