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Header:上圖藍(lán)色和淺綠色文字。
A header is a single line defining a mapping of the following value lines to the type system. A header applies to all processed value lines until the next header or until the end of file, whichever comes first. You can put any number of headers into a CSV file.
定義了接下來value line和type系統(tǒng)的映射關(guān)系。
格式:
mode type[modifier=value];attribute[modifier=value];attribute[modifier=value];attribute[modifier=value][;...];attribute[modifier=value]
方框里的modifier:Gives additional information for translating a value record to the mapped type attribute
例子:INSERT_UPDATE
category;code[unique=true];name[lang=de];name[lang=en];$supercategories;$thumbnail;description[lang=de];order
This header states that each following value line creates or updates a category instance, until another header occurs. 注意,大小寫無關(guān)。
INSERT Address;firstname;owner(Principal.uid|AbstractOrder.code);Hans;admin;Klaus;O-K2006-C0000-001
由|分隔開的語法叫alternative pattern.
When importing the first value line ;Hans;admin, the ImpEx extension searches all instances of the Principal type to verify if any instance exists where the uid attribute is set to admin.
Impex extension首先查找所有principal實(shí)例,看是否存在其uid屬性值為admin的實(shí)例。
注意我們現(xiàn)在是試圖插入Address數(shù)據(jù),如果上述的搜索命中,則將Impex語句里的address值維護(hù)到搜索命中的admin Principal實(shí)例去。
If an instance exists (and there is, by platform default), the new instance of the Address type has its owner attribute set to a reference to that Principal type instance.
如果并沒有Pricipal實(shí)例,其uid屬性等于admin,那么進(jìn)行第二輪搜索,根據(jù)AbstractOrder的code字段進(jìn)行搜索。
Attribute modifier:
...;attribute[modifier=value,modifier=value,modifier=value];... 或者 ...;attribute[modifier=value][modifier=value][modifier=value];...
The value of the $catalog macro sets the catalog id. The value of the $version macro sets the version string of the catalog version to export.
$catalog=clothescatalog $version=Staged
宏的實(shí)現(xiàn):
$catalog=catalog(id) $catalogVersion=catalogVersion($catalog,version)
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