problem description I used SQLAlchemy to build a SQLite database to store literature data. Now I want to check the number of authors of each article. The author and the document are stored in two separate tables, using the identification number of the...
background: const EventUser = sequelize.define( userEvents , { payStatus: Sequelize.STRING }) User.belongsToMany(Event, { through: EventUser}) Event.belongsToMany(User, { through: EventUser}) use: const event = await EventModel.getEvent...
class User extends Model{ public function Roles() { return $this->hasOne("App Role", user_id , id ); } } class Message extends Model{ public function User() { re...
if you use the paginate () method in the framework for paging, the outer layer of the data will be wrapped in an extra layer of paging data, for example: { "total": 50, "per_page": 15, "current_page": 1, &q...
there is a requirement that there is a city field in the MySQL table, and there are 200 cities under that field. Each time, 10 cities are extracted from this field in turn, such as the first 10 cities in the first extraction, 11 ~ 20 in the second extra...
Hibernate uses proxy mode when implementing lazy loading, but ManyToOne defaults to Fetch.EAGER mode, so I wonder whether Hibernate will continue to use proxy mode without lazy loading, and why. ...
$condition there will be a time condition, this time condition is optional, now think if the time condition does not exist, how to remove the time condition? When the time condition exists, then add the query result of the time condition? method 1: an...
question: want to know what specific role ORM plays in MODEl, 1. ORM TPMODELMODELMODELsymfonyORMreposibilitysqlmodel 2. ORMMVCsql 3. DBADBAORM ...
as shown in the figure below, does SQLAlchemy have a simple way to directly declare that the specified field is not mapped serialized? for example, does java s Hibernate framework have such a function? (although there are other "indirect " solut...