JavaScript Interface to Views

This is an introduction to ArangoDB’s interface for views and how to handleviews from the JavaScript shell arangosh. For other languages see thecorresponding language API.

Address of a View

Like collections, views are accessed by the user viatheir unique name and internally via their identifier. Using the identifier foraccessing views is discouraged. Views share their namespace with collections,so there cannot exist a view and a collection with the same name in the samedatabase.

Usage

Here follow some basic usage examples. More details can be found in thefollowing chapters:

  1. arangosh> view = db._createView("myView", "arangosearch", {});

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  1. [ArangoView 87629, "myView" (type arangosearch)]

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Get this view again later by name:

  1. arangosh> view = db._view("myView");

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  1. [ArangoView 87629, "myView" (type arangosearch)]

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Get the view properties:

  1. arangosh> view.properties();

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  1. { 
  2.   "writebufferSizeMax" : 33554432, 
  3.   "consolidationPolicy" : { 
  4.     "type" : "bytes_accum", 
  5.     "threshold" : 0.10000000149011612 
  6.   }, 
  7.   "writebufferActive" : 0, 
  8.   "consolidationIntervalMsec" : 60000, 
  9.   "cleanupIntervalStep" : 10, 
  10.   "links" : { 
  11.   }, 
  12.   "writebufferIdle" : 64 
  13. }

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Set a view property:

  1. arangosh> view.properties({cleanupIntervalStep: 12});

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  1. { 
  2.   "cleanupIntervalStep" : 12, 
  3.   "consolidationIntervalMsec" : 60000, 
  4.   "consolidationPolicy" : { 
  5.     "type" : "bytes_accum", 
  6.     "threshold" : 0.10000000149011612 
  7.   }, 
  8.   "writebufferActive" : 0, 
  9.   "writebufferIdle" : 64, 
  10.   "writebufferSizeMax" : 33554432, 
  11.   "links" : { 
  12.   } 
  13. }

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Add a link:

  1. arangosh> view.properties({links: {colA: {includeAllFields: true}}});

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  1. { 
  2.   "cleanupIntervalStep" : 12, 
  3.   "consolidationIntervalMsec" : 60000, 
  4.   "consolidationPolicy" : { 
  5.     "type" : "bytes_accum", 
  6.     "threshold" : 0.10000000149011612 
  7.   }, 
  8.   "writebufferActive" : 0, 
  9.   "writebufferIdle" : 64, 
  10.   "writebufferSizeMax" : 33554432, 
  11.   "links" : { 
  12.     "colA" : { 
  13.       "analyzers" : [ 
  14.         "identity" 
  15.       ], 
  16.       "fields" : { 
  17.       }, 
  18.       "includeAllFields" : true, 
  19.       "storeValues" : "none", 
  20.       "trackListPositions" : false 
  21.     } 
  22.   } 
  23. }

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Add another link:

  1. arangosh> view.properties({links: {colB: {fields: {text: {}}}}});

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  1. { 
  2.   "cleanupIntervalStep" : 12, 
  3.   "consolidationIntervalMsec" : 60000, 
  4.   "consolidationPolicy" : { 
  5.     "type" : "bytes_accum", 
  6.     "threshold" : 0.10000000149011612 
  7.   }, 
  8.   "writebufferActive" : 0, 
  9.   "writebufferIdle" : 64, 
  10.   "writebufferSizeMax" : 33554432, 
  11.   "links" : { 
  12.     "colA" : { 
  13.       "analyzers" : [ 
  14.         "identity" 
  15.       ], 
  16.       "fields" : { 
  17.       }, 
  18.       "includeAllFields" : true, 
  19.       "storeValues" : "none", 
  20.       "trackListPositions" : false 
  21.     }, 
  22.     "colB" : { 
  23.       "analyzers" : [ 
  24.         "identity" 
  25.       ], 
  26.       "fields" : { 
  27.         "text" : { 
  28.         } 
  29.       }, 
  30.       "includeAllFields" : false, 
  31.       "storeValues" : "none", 
  32.       "trackListPositions" : false 
  33.     } 
  34.   } 
  35. }

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Remove the first link again:

  1. arangosh> view.properties({links: {colA: null}});

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  1. { 
  2.   "cleanupIntervalStep" : 12, 
  3.   "consolidationIntervalMsec" : 60000, 
  4.   "consolidationPolicy" : { 
  5.     "type" : "bytes_accum", 
  6.     "threshold" : 0.10000000149011612 
  7.   }, 
  8.   "writebufferActive" : 0, 
  9.   "writebufferIdle" : 64, 
  10.   "writebufferSizeMax" : 33554432, 
  11.   "links" : { 
  12.     "colB" : { 
  13.       "analyzers" : [ 
  14.         "identity" 
  15.       ], 
  16.       "fields" : { 
  17.         "text" : { 
  18.         } 
  19.       }, 
  20.       "includeAllFields" : false, 
  21.       "storeValues" : "none", 
  22.       "trackListPositions" : false 
  23.     } 
  24.   } 
  25. }

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Drop the view:

  1. arangosh> db._dropView("myView");

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  1.  

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