프로그래밍2013.12.03 20:23


출처:https://developer.palm.com/content/api/reference/data-types/db8.html

db8 Data Types

 Date Type

Description 

Ref'd by 

Wrapper APIs 

Service APIs 
BatchOperation Method and parameters for operation in batch.     batch
BatchResponse Response to batch API call.     batch
CountResponse Number of objects affected by operation.   del
merge
del
merge
ErrResponse Standard error response, containing operation success or failure flag, error code and error message.   del
delKind
find
get
merge
put
putKind
reserveIds
batch
del
delKind
find
get
merge
put
putKind
reserveIds
search
watch
FindResponse Response to find operation.   find find
search
GetResponse Parameters for get objects operation response.   get get
IndexClause Used for creating indexes for kind object.   putKind
putKind
IndexPropClause Defines index property. IndexClause    
NotificationResponse Notifies caller of change in query results.   find find
search
watch
PutResponse Indicates success of operation and returns id and revfields for each object.   del
merge
put
del
merge
put
PutResult Contains id and revfield for JSON data object stored in put operation. PutResponse    
Query Defines db8 query.   del
merge
find
del
merge
find
watch
ReserveIdsResponse Contains operation success or failure flag and array of reserved db8 IDs.   reserveIds reserveIds
RevSetClause Defines a revision set for a kind. SeeUsing Revision Setsfor more information.     putKind
RevSetPropClause Defines a property in a revision set. RevSetClause    
SuccessResponse Indicates operation success or failure.   delKind
putKind
delKind
putKind
watch
WhereClause Defines SQL-like JSON where clause for query. Query    


 


BatchOperation

Method and params for batch operation.

Schema

{
   "method" : string,
   "params" : any
}

Elements

Element Required Type Description
method Yes string Operation to perform. Possible values: "del", "find", "get", "merge", or "put".
params Yes any Method parameters.


 


BatchResponse

Response to batch operation.

Schema

{
   "returnValue" : boolean,
   "responses"   : any array
}

Elements

Element Required Type Description
returnValue Yes boolean Success (true) or Failure (false).
responses Yes any array Array of responses for each of the operations in the batch.


 


CountResponse

Number of objects affected by operation.

Schema

{
   "returnValue" : boolean,
   "count"       : int
}

Elements

Element Required Type Description
returnValue Yes boolean true (success) or false (failure).
count Yes int Number of objects affected by operation.


 


ErrResponse

Standard error response, containing operation success or failure flag, error code and error message.

Schema

{
   "returnValue" : boolean,
   "errorCode"   : int,
   "errorText"   : string
}

Elements

Element Required Type Description
returnValue Yes boolean true (success) or false (failure).
errorCode Yes int Numeric error code.
errorText Yes string Error message.


 


FindResponse

Response to a find objects operation.

Schema

{
   "returnValue" : boolean,
   "results"     : any,
   "count"       : int,
   "next"        : string
}

Elements

Element Required Type Description
returnValue Yes boolean true (success) or false (failure).
results Yes any Array of db8 kind data objects. What is returned depends on the query and what is stored.
count No int Number of results that would have been returned if a limit had not been specified.
next No string Key to pass as query's "page" property when retrieving next page of results.


 


GetResponse

Parameters for get objects operation response.

Schema

{
      "returnValue" : boolean,
      "results"     : any
}

Elements

Element Required Type Description
returnValue Yes boolean true (success) or false (failure).
result Yes any object array Returns array of stored db8 data objects.


 


IndexClause

Used in the putKind call for creating kind object indexes. Note that indexes determine the type of queries your app can make. See Queries and Indexing for more information.

Set the "incDel" flag to true if you want future queries to return marked as deleted objects. Objects are not completely deleted until an administrative purge operation takes place.

Schema

{
   "name"    : string,
   "props"   : IndexPropClause,
   "incDel"  : boolean
}

Elements

Element Required Type Description
name Yes string Index name
props Yes IndexPropClause Array of properties to index together.
incDel No boolean Include deleted objects flag. Default is false.

Example

{
   "name"   : "state", 
   "props"  : [{"name": "state"}],
   "incDel" : false
}


 


IndexPropClause

Defines index property for IndexClause

Schema

{
   "name"     : string,
   "collate"  : string, 
   "default"  : any,
   "tokenize" : string,
   "type"     : string
}

Elements

Element Required Type Description
name Yes string Name of property being indexed.
collate   No string Indicates the string comparison routine used to order the index. Must be one of the following:
  • default—Does binary comparison.
  • primary—Compares base characters (for example, "a" < "b") without considering accents, case, or tone marks.
  • secondary—Accents in the characters are considered secondary differences (for example, "as" < "às" < "at"). Other differences between letters can also be considered secondary differences, depending on the language. A secondary difference is ignored when there is a primary difference anywhere in the strings.
  • tertiary—Upper and lower case differences in characters are distinguished at the tertiary level (for example, "ao" < "Ao" < "aò"). In addition, a variant of a letter differs from the base form on the tertiary level (such as "A" and "?"). A tertiary difference is ignored when there is a primary or secondary difference anywhere in the strings.
default No any Default value to set for this property at insertion time, if not present.
tokenize No string

Indicates if words in strings should be broken up, i.e., should "Hello World" become "Hello" and "World" for purposes of indexing.

Must be one of the following:

  • none—Does not tokenize.
  • default—Use the default for the locale (which may strip stop-words). Stop-words are common words that are stripped for purposes of indexing, i.e., "the", "a", "an", "is", etc.
  • all—Tokenizes all words.
type Yes string "single" or "multi". Single property or multiple properties.

 


NotificationResponse

Notifies caller of change in query results returned from a "find" call.

Schema

{
   "returnValue" : boolean,
   "fired"       : boolean
}

Elements

Element Required Type Description
returnValue No boolean true (success) or false (failure).
fired Yes boolean Change notification flag.


 


PutResponse

Indicates success of operation and returns id and rev fields for each object.

Schema

{
   "returnValue" : boolean,
   "results"     : PutResult 
}

Elements

Element Required Type Description
returnValue Yes boolean true (success) or false (failure).
results Yes PutResult Array of objects containing the id and rev of each object that was put.


 


PutResult

Contains "id" and "rev" fields in PutResponse for JSON data object.

Schema

{
   "id"    : any,
   "rev"   : any
}

Elements

Element Required Type Description
id Yes any ID of the object that was put.
rev Yes any Object's revision ID. Every db8 object has this ID field. db8 maintains a global rev id counter that is incremented every time a db8 object is created or updated.


 


Query

Defines a db8 query.

Schema

{
   "select"  : string array,
   "from"    : string,
   "where"   : WhereClause array,
   "orderBy" : string,
   "desc"    : boolean,
   "incDel"  : boolean,
   "limit"   : int,
   "page"    : string
}

Elements

Element Required Type Description
select No string array Array of property names to return.
from Yes string Name of kind to retrieve results from.
where No WhereClausearray Array of clauses to test.
orderBy No string Order results on this property.
desc No boolean Return results in descending order.
incDel No boolean Include deleted objects. Deleted objects have _del=true.
Note: You can only request this if the "incDel" field was true when you created your indexes during a "putKind" operation. Otherwise, the query fails with a "no index for this query" message.
limit No int Specifies maximum number of results to return (0-500). Default is 500.
page No string Page key returned by previous query.

Example

{
   "select"  : ["displayName", "state"],
   "from"    : "com.mystuff.contacts:1",
   "where"   : [{"prop":"state","op":"=","val":"CA"}], 
   "orderBy" : "displayName",
   "desc"    : true 
}

 


ReserveIdsResponse

Contains operation success or failure flag and array of reserved db8 IDs returned from "reserveIds" call.

Schema

{
   "returnValue" : boolean,
   "ids"         : string array
}

Elements

Element Required Type Description
returnValue Yes boolean true (success) or false (failure).
ids No string array Array of reserved IDs.


 


RevSetClause

Defines a revision set—subset of an object's properties that your app can be notified about when one of the properties is modified. See Using Revision Sets for more information.

Schema

{
   "name"  : string,
   "props" : RevSetPropClause array
}

Elements

Element Required Type Description
name Yes string Name of the revision set (unique to this kind).
props Yes RevSetPropClausearray Array of properties to include in revision set.

 


RevSetPropClause

A property in a RevSetClause.

Schema

{
   "name"  : string,
}

Elements

Element Required Type Description
name Yes string Name of property to include in revision set.


 


SuccessResponse

Indicates operation success or failure.

Schema

{
   "name"  : string,
}

Elements

Element Type Description
returnValue boolean true (success) or false (failure).

Example

{
   "returnValue": false
}

 


WhereClause

Defines a SQL-like JSON where clause for a db8 Query.

Schema

{
   "prop"    : string,
   "op"      : string, 
   "val"     : any,
   "collate" : string
}

Elements

Element Required Type Description
prop Yes string Name of property to test.
op Yes string Test operator. Must be one of the following:
"<", "<=", "=", ">=", ">", "!=", "%", "?"
(less than, less than or equal, equals, greater than or equal, greater than, not equal, wildcard, and full-text)
The "%" operator (aka - the prefix operator) will return all matches beginning with the value specified.
val Yes any Value to test against.
collate No any Indicates the string comparison routine used to order the results. See the collate field in the IndexPropClause data structure for more information.

Example

{
   "prop" : "state",
   "op"   : "=",
   "val"  : "CA"
}


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