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Features/Plain Query Format (view source)

Revision as of 17:01, 5 November 2013

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<noinclude>{{GoogleTrans-en}}{{TOCright}}
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[[Category:Feature Page Incomplete]]
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[[Category:FeatureObsoleted|Plain Query Format]]</noinclude>
    
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== Summary ==
 
== Summary ==
   −
Provide simple string query format for Datastore find() method to cover all kinds of requests.
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Provide a simple string query format for the Datastore find() method to cover all kinds of requests.
    
== Owner ==
 
== Owner ==
   −
* Name: [[User:alsroot| Aleksey Lim]]
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* Name: ?
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* Email: [[Special:Emailuser/alsroot|send an email]]
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* Email: ?
    
== Current status ==
 
== Current status ==
   −
* Targeted release: 0.86
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* Targeted release: ?
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* Last updated: Fri Jul 17 06:34:13 UTC 2009
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* Last updated: Tue Aug 25 07:59:58 UTC 2009
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* Percentage of completion: 0%
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* Percentage of completion: 90%, core part was implemented within [[Version support for datastore/Proposal]]
    
== Detailed Description ==
 
== Detailed Description ==
   −
Instead of having complicated query format for org.laptop.sugar.DataStore::find(), use plain string [http://www.xapian.org/docs/queryparser.html full featured] query format i.e. use all system query parameters(like timestamp, mime_type etc.) in query string(from former find()'s 'query' argument).
+
Let users create complex queries with all possible terms (see Xapian [http://xapian.org/docs/glossary.html glossary]) including system ones. Users can use in query string [[#System prefixes|system]] prefixes and predefined set of [[#Users predefined prefixes|custom]] prefixes.
 +
 
 +
Prefixes in query string could look like
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<prefix>:<one-word-value>
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<prefix>:"<multi-word-value>"
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 +
Values for system prefixes, Sugar fills on its own, i.e., if ''title'' metadata field is ''My activity'', user can type ''title:"My activity"'' in query string to search ''My activity'' substring only within ''title'' fields.
 +
 
 +
Values for [[#Users predefined prefixes|custom]] prefixes user should place to ''tags'' metadata field in the same form like in query string.
   −
All system, users predefined and some(its up to user) of users query terms
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If value is multi-worded, any of these words could be used in query, e.g., ''title:My'' or ''title:activity''.
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* use prefixes like mime_type:"text/plain", author:Strugatsky etc.
  −
* could be ranged e.g. timestamp:<stamp1>..<stamp2>
  −
* could be sorted
     −
==== System terms ====
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==== System prefixes ====
    
{| border=1 cellpadding=3 style="border: 1px solid white; border-collapse: collapse; background: #e3e4e5;"
 
{| border=1 cellpadding=3 style="border: 1px solid white; border-collapse: collapse; background: #e3e4e5;"
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! Datastore field
 
! Datastore field
 
! Flags/Parameters
 
! Flags/Parameters
 +
! Dublin Core
 
! Notes
 
! Notes
 
|-
 
|-
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| ''tree_id''
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| ''uid''
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|-
+
|
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| ''version_id''
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| [http://dublincore.org/documents/dces/#identifier identifier]
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|-
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|
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| ''parent_id''
  −
|-
  −
| ''ctime''
  −
| ranged sorted
   
|-
 
|-
 
| ''bundle_id''
 
| ''bundle_id''
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|-
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|
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| ''entry_type''
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|
−
|-
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| postponed until we decide to use Journal to represent activities
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| ''creator''
   
|-
 
|-
 
| ''mime_type''
 
| ''mime_type''
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|
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| [http://dublincore.org/documents/dces/#format format]
 +
|
 
|-
 
|-
 
| ''title''
 
| ''title''
 
| sorted
 
| sorted
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| [http://dublincore.org/documents/dces/#title title]
 +
|
 +
|-
 +
| ''activity''
 +
|
 +
|
 +
|
 
|-
 
|-
 
| ''activity_id''
 
| ''activity_id''
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|
 +
|
 +
|
 
|-
 
|-
 
| ''timestamp''
 
| ''timestamp''
 
| ranged sorted
 
| ranged sorted
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|
 +
|
 
|-
 
|-
 
| ''keep''
 
| ''keep''
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|
 +
|
 +
|
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|-
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| ''tags''
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|
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|
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| see [[#Users predefined terms]]
 
|-
 
|-
 
| ''filesize''
 
| ''filesize''
 
| ranged sorted
 
| ranged sorted
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| TODO: propose adding this field to DS
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|
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| postponed for [[Features/Unified Browser for Objects]]
 
|-
 
|-
 
| ''participant''
 
| ''participant''
 
| sorted
 
| sorted
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| TODO: propose adding this field to DS
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|
 +
|
 
|-
 
|-
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| ''buddies_count''
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| ''description''
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| sorted
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|
−
| (?)
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| [http://dublincore.org/documents/dces/#description description]
 +
|
 
|-
 
|-
 
|}
 
|}
   −
==== Users predefined terms ====
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==== Users predefined prefixes ====
    
{| border=1 cellpadding=3 style="border: 1px solid white; border-collapse: collapse; background: #e3e4e5;"
 
{| border=1 cellpadding=3 style="border: 1px solid white; border-collapse: collapse; background: #e3e4e5;"
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! Datastore field
 
! Datastore field
 
! Flags/Parameters
 
! Flags/Parameters
 +
! Dublin Core
 
! Notes
 
! Notes
 
|-
 
|-
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| ''artist''
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| ''contributor''
 
| sorted
 
| sorted
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| [http://dublincore.org/documents/dces/#contributor contributor]
 
|-
 
|-
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| ''album''
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| ''coverage''
 
| sorted
 
| sorted
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| [http://dublincore.org/documents/dces/#coverage coverage]
 
|-
 
|-
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| ''author''
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| ''creator''
 
| sorted
 
| sorted
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| and composer as well
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| [http://dublincore.org/documents/dces/#creator creator]
 
|-
 
|-
 
| ''date''
 
| ''date''
 
| ranged sorted
 
| ranged sorted
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| [http://dublincore.org/documents/dces/#date date]
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|-
 +
| ''language''
 +
| sorted
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| [http://dublincore.org/documents/dces/#language language]
 
|-
 
|-
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| ''genre''
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| ''publisher''
 
| sorted
 
| sorted
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| [http://dublincore.org/documents/dces/#publisher publisher]
 
|-
 
|-
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| ''track_number''
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| ''relation''
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| ranged sorted
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| sorted
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| [http://dublincore.org/documents/dces/#relation relation]
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|-
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| ''rights''
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| sorted
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| [http://dublincore.org/documents/dces/#rights rights]
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|-
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| ''source''
 +
| sorted
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| [http://dublincore.org/documents/dces/#source source]
 +
|-
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| ''subject''
 +
| sorted
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| [http://dublincore.org/documents/dces/#subject subject]
 
|-
 
|-
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| ''track_count''
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| ''type''
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| ranged sorted
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| sorted
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| [http://dublincore.org/documents/dces/#type type]
 
|-
 
|-
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| ''disc_number''
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| ''track''
 
| ranged sorted
 
| ranged sorted
 
|-
 
|-
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| ''disc_count''
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| ''disc''
 
| ranged sorted
 
| ranged sorted
−
|-
  −
| ''copyright''
  −
| sorted
   
|-
 
|-
 
|}
 
|}
   −
==== Another ways to differentiate DS objects ====
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==== Result set control parameters ====
   −
All metadata fields will be tracked as usual, so regular search(w/o prefixes) should work. There is only one addition - optional prefixes in ''tags'' field.
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New find() method still has optional dictionary argument to control final result set.
   −
All substrings(tags) from ''tags'' field in format:
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{| border=1 cellpadding=3 style="border: 1px solid white; border-collapse: collapse; background: #e3e4e5;"
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* ''<substring_w/o_separators>:<string_w/o_separators_after_:>''
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|-style="background:#787878; color: white;"
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* ''<substring_w/o_separators>:"<string_w/o_separators_after_: but with separators inside string>"''
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! Dictionary key
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! Notes
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Will be treated as tags with prefix, so user can type in search bar:
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|-
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* ''books:favorite'' if ''tags'' has substring ''books:favorite''
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| ''offset''
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* ''books:brothers'' if ''tags'' has substring ''books:"The Strugatsky brothers"''
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|-
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| ''limit''
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|-
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| ''order_by''
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|-
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| ''lang''
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| to setup stemming
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|}
    
== Benefit to Sugar ==
 
== Benefit to Sugar ==
   −
* simple(plain string in comparing with existed API with dictionary find()'s argument) query format for dbus find() method
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* Feature lets users specify exact metadata fields to search for.
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* simple and new-feature-proof way to implement find method for example in CLI tools(because this tool needs only to pass plain string to Datastore service)
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* let experienced users make complicated search in Journal etc.
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* existed implementation has hard-coded logic for example in case of having several mime_types in query(all mime_types will be ORed despite what user wants).
      
== Scope ==
 
== Scope ==
    
* implementation in Datastore
 
* implementation in Datastore
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* provide new dbus method to search
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* support existed find() and mark it deprecated
      
== How To Test ==
 
== How To Test ==
   −
Run unit tests.
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''This does not need to be a full-fledged document.  Describe the dimensions of tests that this feature is expected to pass when it is done.  If it needs to be tested with different hardware or software configurations, indicate them.  The more specific you can be, the better the community testing can be.''
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 +
''Remember that you are writing this how to for interested testers to use to check out your feature - documenting what you do for testing is OK, but it's much better to document what *I* can do to test your feature.''
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''A good "how to test" should answer these four questions:''
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* ''What special hardware / data / etc. is needed (if any)?
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* ''How do I prepare my system to test this feature? What packages need to be installed, config files edited, etc.?
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* ''What specific actions do I perform to check that the feature is working like it's supposed to?
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* ''What are the expected results of those actions?''
    
== User Experience ==
 
== User Experience ==
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''If this feature is noticeable by its target audience, how will their experiences change as a result?  Describe what they will see or notice.''
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 +
* feature just expands query dictionary
    
== Dependencies ==
 
== Dependencies ==
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* [http://www.xapian.org/docs/queryparser.html Xapian query language]
 
* [http://www.xapian.org/docs/queryparser.html Xapian query language]
 +
* [http://dublincore.org/documents/usageguide/ Using Dublin Core]
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* [http://lcweb2.loc.gov/diglib/loc.terms/relators/dc-relators.html Relator Terms and Dublin Core Elements]
    
== Release Notes ==
 
== Release Notes ==
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== Comments and Discussion ==
 
== Comments and Discussion ==
 
* See [[{{TALKPAGENAME}}|discussion tab for this feature]] <!-- This adds a link to the "discussion" tab associated with your page.  This provides the ability to have ongoing comments or conversation without bogging down the main feature page -->
 
* See [[{{TALKPAGENAME}}|discussion tab for this feature]] <!-- This adds a link to the "discussion" tab associated with your page.  This provides the ability to have ongoing comments or conversation without bogging down the main feature page -->
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  −
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[[Category:Feature Page Incomplete]]
  −
[[Category:Feature]]
 
Godiard
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