-  NULL data in the database 
 
- Angular DB 
- Angular console.log():NULL 
- Angular : this.expandForm.setValue({...val[0]});:val oordercode
- after processing by the above method, you can assign the value that exists on the DB side to 
 when all the attributes are present. If there is a value on the DB side, fill it, and then the NULL value on the DB side is also NULL
 . Then you can happily assign the value: {... newData} later.
 I feel so tired. Is there any other way to achieve it? Or did I go the wrong way in the first place?
 Welcome to contact QQ:409223171, please indicate: null
