-
3 votesanswersviews
具有NSData变量的Realm对象,在展开Optional值时意外地发现nil
在我的Realm Model中添加NSData变量后出现错误: 致命错误:在展开Optional值时意外发现nil 我不使用NSData值时不会出现此错误 . 这是我简单的Item(Item.swift) class Item: Object { dynamic var Name: String = "" dynamic var Adress:String ... -
0 votesanswersviews
Swift viewcontroller声明返回nil
let saveNewItem = SaveNewItem() print(saveNewItem) if saveNewItem != nil { print("Contains a value!") _ = UIApplication.shared.keyWindow!.rootViewController ... -
1 votesanswersviews
Sequelize嵌套是当include的主题可能为null时
在我的模特中,我有 User , belongsTo({ model: Company, as: 'company' }) (相反 Company hasMany({ model: User, as: 'members' }) ) 我构建了一个查询如下 const query = { where: { onboardingState: 'pending' }, include: [ ...