貸出管理の ER 図を追加。

Author: mikoto2000

doc/diagram/ER.puml

@@ -1,36 +1,110 @@
 @startuml
-entity NdcCategory {
-  * id
-  --
-  * name
-  * number
-}
 
-entity Book {
-  * id
-  --
-  * ISBN
-  * title
-  * publication_date
-  * category(FK: NdcCategory(id))
-}
+package "貸出管理" {
+
+  entity BookStock {
+    * id
+      --
+      * book_id (FK: Book(id))
+      * status (FK: BookStatus(id))
+      memo
+  }
+
+  entity BookStockStatus {
+    * id
+      --
+      * name
+  }
+
+  note bottom: 貸出可能, 貸出不可, 破棄\n図書館の実務的には「貸出不可」を細分化すべきかもしれない？
+
+  entity Customer {
+    * id
+      --
+      * name
+      * email_address
+  }
+
+  entity Lending {
+    * id
+      --
+      * lending_set_id (FK: LendingSet(id))
+      * customer_id (FK: Customer(id))
+      * book_stock_id (FK: BookStock(id))
+  }
+
+  entity LendingSet {
+    * id
+      --
+      * LendingSetStatus (FK: LendingStatus(id))
+      * lend_start_date
+      * return_deadline_date
+      return_date
+  }
+
+  entity LendingStatus {
+    * id
+      --
+      * name
+  }
+
+  note bottom: 貸出中, 貸出期限超過, 返却済み
 
-entity Author {
-  * id
-  --
-  * firstname
-  * lastname
 }
 
-entity BookAuthorRelationship {
-  * id
-  --
-  * book_id (FK:Book(id))
-  * author_id (FK:Author(id))
+package "書籍管理" {
+
+  entity NdcCategory {
+    * id
+      --
+      * name
+      * number
+  }
+
+  entity BookMaster {
+    * id
+      --
+      * ISBN (UNIQUE)
+      * title
+      * publication_date
+      * category(FK: NdcCategory(id))
+  }
+
+  entity Author {
+    * id
+      --
+      * firstname
+      * lastname
+  }
+
+  entity BookAuthorRelationship {
+    * id
+      --
+      * book_id (FK:Book(id))
+      * author_id (FK:Author(id))
+  }
+
 }
 
-Book ||-{ BookAuthorRelationship
-Book }o--|| NdcCategory
+BookMaster ||-{ BookAuthorRelationship
+BookMaster }o--|| NdcCategory
 BookAuthorRelationship }-|| Author
 
+BookStock }o-|| BookMaster
+Lending }o-|{ BookStock
+LendingSet }o-- Customer
+
+BookStock }o--|| BookStockStatus
+Lending }|--|| LendingSet
+LendingStatus - LendingSet
+
+"貸出管理" -[hidden]- "書籍管理"
+
+entity "<テーブル名>" {
+  * 主キー
+    --
+    カラム
+    * 必須カラム
+}
+
 @enduml