Difference between revisions of "COLUMNMETADATA()"
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==See Also== | ==See Also== | ||
| − | [[ACLASS()]], [[ADDPROPERTY()]], [[AMEMBERS()]], [[COMPOBJ()]], [[CREATEOBJECT()]], [[DEFINE CLASS]], [[DISPLAY CLASSES]], [[DODEFAULT()]], [[FOREACH]], [[JSON_DECODE()]], [[JSON_DECODE_FILE()]], [[JSON_ENCODE()]], [[LIST CLASSES]], [[LOADOBJECT()]], [[METADATA_DECODE()]], [[METADATA_ENCODE()]], [[METADATA_FINDTYPE()]], [[NEWOBJECT()]], [[OBJECT()]], [[PRINT_JSON()]], [[PRINT_HTML()]], [[PRINT_R()]], [[PRINT_XML()]], [[REMOVEPROPERTY()]], [[REQUIRE_ONCE()]], [[SAVEOBJECT()]], [[SQL SELECT]], [[SOCKET_CLOSE()]], [[SOCKET_LASTERROR()]], [[SOCKET_OPEN()]], [[SOCKET_PEEK()]], [[SOCKET_READ()]], [[SOCKET_SERVER()]], [[SOCKET_WRITE()]], [[TABLEMETADATA()]], [[WITH]], [[XML_DECODE_FILE()]] | + | [[ACLASS()]], [[ADDPROPERTY()]], [[AMEMBERS()]], [[COMPOBJ()]], [[CREATEOBJECT()]], [[DEFINE CLASS]], [[DISPLAY CLASSES]], [[DODEFAULT()]], [[FOREACH]], [[JSON_DECODE()]], [[JSON_DECODE_FILE()]], [[JSON_ENCODE()]], [[LIST CLASSES]], [[LOADOBJECT()]], [[METADATA_DECODE()]], [[METADATA_ENCODE()]], [[METADATA_FINDTYPE()]], [[NEWOBJECT()]], [[OBJECT()]], [[PRINT_JSON()]], [[PRINT_HTML()]], [[PRINT_R()]], [[PRINT_XML()]], [[REMOVEPROPERTY()]], [[REQUIRE_ONCE()]], [[SAVEOBJECT()]], [[SQL SELECT]], [[SOCKET_CLOSE()]], [[SOCKET_LASTERROR()]], [[SOCKET_OPEN()]], [[SOCKET_PEEK()]], [[SOCKET_READ()]], [[SOCKET_SERVER()]], [[SOCKET_WRITE()]], [[TABLEMETADATA()]], [[TABLEMETADATAVERSION()]], [[WITH]], [[XML_DECODE_FILE()]] |
==Description== | ==Description== | ||
Revision as of 12:17, 18 February 2016
Contents
Purpose
Function to return the METADATA string from the Active Data Dictionary associated with the specified column in the active table
Syntax
COLUMNMETADATA(<expC1>)
See Also
ACLASS(), ADDPROPERTY(), AMEMBERS(), COMPOBJ(), CREATEOBJECT(), DEFINE CLASS, DISPLAY CLASSES, DODEFAULT(), FOREACH, JSON_DECODE(), JSON_DECODE_FILE(), JSON_ENCODE(), LIST CLASSES, LOADOBJECT(), METADATA_DECODE(), METADATA_ENCODE(), METADATA_FINDTYPE(), NEWOBJECT(), OBJECT(), PRINT_JSON(), PRINT_HTML(), PRINT_R(), PRINT_XML(), REMOVEPROPERTY(), REQUIRE_ONCE(), SAVEOBJECT(), SQL SELECT, SOCKET_CLOSE(), SOCKET_LASTERROR(), SOCKET_OPEN(), SOCKET_PEEK(), SOCKET_READ(), SOCKET_SERVER(), SOCKET_WRITE(), TABLEMETADATA(), TABLEMETADATAVERSION(), WITH, XML_DECODE_FILE()
Description
The COLUMNMETADATA() function is used to return the METADATA string from the Active Data Dictionary associated with the specified column in the active table. This can be a JSON encoded complex object containing properties that are arrays of objects or nested objects. You can change the elements of the metadata object then update the Active Data Dictionary with the new metadata.
Example
open database southwind use customers omd = object() omd.caption = "Customer Name" omd.searchfield = .t. alter table customers modify constraint companyname metadata json_encode(omd) use customers omd = json_decode( columnMetaData("companyname")) omd.caption = "Customer" omd.picture = "@!" omd.searchfield = .t. alter table customers modify constraint companyname metadata json_encode(omd) ? json_decode( columnMetaData("companyname")) Object (refcnt=1) ( [caption] => Customer [searchfield] => True [picture] => @! )
