我有两个具有以下结构的 SQLite 表:
CREATE TABLE "log" (
"id" INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT,
"name" TEXT,
"value" INTEGER NOT NULL,
"category_id" INTEGER NOT NULL,
"date" TEXT NOT NULL,
FOREIGN KEY("category_id") REFERENCES "category"("id")
);
CREATE TABLE "category" (
"id" INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT,
"category_name" TEXT NOT NULL,
"type" TEXT NOT NULL
);
我还想显示QTableView
使用 a 的 a QSqlRelationalTableModel
。我需要显示两列 (category_name
和type
) 而不是category_id
,尽管QSqlRelation似乎只用一列替换了外键,但我设法显示了 2 列,如下所示:
self.balance_table_model = QSqlRelationalTableModel()
self.balance_table_model.setTable("log")
self.balance_table_model.setRelation(3, QSqlRelation("category", "id", "category_name, type"))
self.balance_table_model.setHeaderData(1, Qt.Horizontal, "Name")
self.balance_table_model.setHeaderData(2, Qt.Horizontal, "Value")
self.balance_table_model.setHeaderData(3, Qt.Horizontal, "Category")
self.balance_table_model.setHeaderData(4, Qt.Horizontal, "Type")
self.balance_table_model.setHeaderData(5, Qt.Horizontal, "Date")
self._ui.balanceTableView.setModel(self.balance_table_model)
self._ui.balanceTableView.setColumnHidden(0, True)
现在,当我想添加一个新行时,只有当我加入没有类型的两个表时,插入才有效,即
self.balance_table_model.setRelation(3, QSqlRelation("category", "id", "category_name"))
插入代码:
record = self.balance_table_model.record()
record.setGenerated(0, True)
record.setValue(1, log_name)
record.setValue(2, log_value)
record.setValue(3, category_id)
record.setValue(4, date)
self.balance_table_model.insertRecord(-1, record)
如何在仍然能够显示type
列的同时使插入工作?