如何简化这段代码？ （Node JS使用sqlite）IDE：Notepad ++ Database：DB Browser

Question

请帮我简化一下。我的程序有很多字段存储在数据库中（每个表大约100个），我认为这不是一个好主意。

这是我的代码

	eacode = req.body.eacode;
	hcn = req.body.hcn;
	shsn = req.body.shsn;
	name = req.body.name;
	TENURHWS = req.body.TENURHWS;
	TENURLOT = req.body.TENURLOT;
	DWELTYPE = req.body.DWELTYPE;
	DWELTYPE_OTH = req.body.DWELTYPE_OTH;
	ROOF = req.body.ROOF;
	ROOF_OTH = req.body.ROOF_OTH;
	WALL = req.body.WALL;
	WALL_OTH = req.body.WALL_OTH;
	FLOOR = req.body.FLOOR;
	BEDROOM = req.body.BEDROOM;

db.run("INSERT INTO form12(name,TENURHWS,TENURLOT,DWELTYPE,DWELTYPE_OTH,ROOF,ROOF_OTH,WALL,WALL_OTH,FLOOR,BEDROOM) VALUES $name,$TENURHWS,$TENURLOT,$DWELTYPE,$DWELTYPE_OTH,$ROOF,$ROOF_OTH,$WALL,$WALL_OTH,$FLOOR,$BEDROOM)",
      { 
       $name : name,
		$TENURHWS : TENURHWS,
		$TENURLOT : TENURLOT,
		$DWELTYPE : DWELTYPE,
		$DWELTYPE_OTH : DWELTYPE_OTH,
		$ROOF : ROOF,
		$ROOF_OTH : ROOF_OTH,
		$WALL : WALL,
		$WALL_OTH : WALL_OTH,
		$FLOOR : FLOOR,
		$BEDROOM : BEDROOM
      });

Answer 1

如果您的代码太长而无法手动输入每个部分，请查看是否可以使用循环来获得类似的结果。在您的示例中，如果req.body仅包含应保存到数据库的密钥，则可以使用以下代码：

var fieldNames = req.body.keys();

// You could also store a manually maintained list of fields in you own list.
// var fieldNames = ["field1", "field2", "field3", ... , "fieldn"];

sqlStatement = "INSERT INTO form12(" + fieldNames.join(",") + ") Values (";

for(var i = 0; i < fieldNames.length; i++) {
    // Add other logic for building the values part
    sqlStatement += "'" + req.body[fieldNames[i]] + "', ";
}

// Remove trailing comma

sqlStatement += ")";