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protogrid:proto [2017-08-25 13:52] – created pgrid_wiki_adminprotogrid:proto [2021-12-21 22:58] (current) – dru
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 ====== Proto ====== ====== Proto ======
  
-What exactly is a **Proto**, and where is it useful?+A Proto defines some type of [[protogrid:card|Card]] in your Application. A Proto can be seen as a template for Cards. Every proto has a name and a plural name for the [[protogrid:proto#Overview Proto|Overview Proto]]. The Proto defines the [[protogrid:field|fields]] and [[protogrid:widget|widgets]] on the card. In addition, one can specify [[protogrid:access_rights|access rights]] for all Cards based on this Proto and which [[protogrid:script_library#Server_ScriptLibrary|Server ScriptLibrary]] belongs to this Proto. 
 + 
 +===== Comparison with relational databases ===== 
 +In relational databases, the data model is represented by the table schema. A table for "books" may define the attributes "ID", "name", "author", such that each data entry has to define a value for each of these attributes. In Protogrid, a Proto takes the role of the table in such a way that it defines the data schema for all cards which are based on this Proto. 
 + 
 +===== Find the Proto Key ===== 
 +To get the Protokey of a Card, first open the relative Proto by clicking onto "This Card -> Open Proto" in the bottom left corner: 
 + 
 +{{:protogrid:open_proto.png?nolink|}} 
 + 
 +On the Proto Card you choose "This Card -> Show Properties": 
 + 
 +{{:protogrid:show_properties.png?nolink|}} 
 + 
 +In the opening Box, you find the Protokey labeled as "Card Key" (since it is also the key of the Card defining the Proto Definition): 
 + 
 +{{:protogrid:protokey.png?nolink|}} 
 + 
 +==== Overview Proto ==== 
 +An Overview Proto is automatically created on the creation of a new Proto. The Overview Proto only contains a [[protogrid:tableview|Tableview]], containing all the Cards of the created Proto. 
 + 
 +==== Data Proto ==== 
 +Every Proto containing more than a TableView is called a Data Proto, since it also contains some information stored in the Card and not only an overview of all the Cards. 

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