multi-table

Multi-table database SQLite android

由 假如想象 提交于 2019-12-05 07:37:35
问题 I'm new with database (SQLite) and I'm trying to do a multi-table database in android. Each table has the same rows (id, name , ph_number). Every tables store a "contact" object. When I want to store a contact in one table with the method addContactDatos(Contact contact, int partido), it's stored in every tables not just in the one I want. How can I solve it? This is the Handler: public class DatabaseHandler extends SQLiteOpenHelper { // Database Version private static final int DATABASE

EntityFramework Mutli-Table Many-to-Many

由 雨燕双飞 提交于 2019-12-04 02:35:39
问题 I'm working with EF4.1 Code First and am trying to create some Many-to-Many relationship tables where there tables would need to be linked. Please see small snippet of code beloow: class Event { int EventId { get; set; } ICollection<Contact> Contacts { get; set; } } class Contact { int ContactId { get; set; } ICollection<Relation> Relations { get; set; } } class Relation { int RelationId { get; set; } string Name { get; set; } } So the Contacts object can have many different types of

Multi-table database SQLite android

由 一曲冷凌霜 提交于 2019-12-03 21:51:38
I'm new with database (SQLite) and I'm trying to do a multi-table database in android. Each table has the same rows (id, name , ph_number). Every tables store a "contact" object. When I want to store a contact in one table with the method addContactDatos(Contact contact, int partido), it's stored in every tables not just in the one I want. How can I solve it? This is the Handler: public class DatabaseHandler extends SQLiteOpenHelper { // Database Version private static final int DATABASE_VERSION = 1; // Database Name private static final String DATABASE_NAME = "contactsManager"; // Contacts

Django Multi-Table Inheritance VS Specifying Explicit OneToOne Relationship in Models

由 我怕爱的太早我们不能终老 提交于 2019-12-03 01:50:34
问题 Hope all this makes sense :) I'll clarify via comments if necessary. Also, I am experimenting using bold text in this question, and will edit it out if I (or you) find it distracting. With that out of the way... Using django.contrib.auth gives us User and Group, among other useful things that I can't do without (like basic messaging). In my app I have several different types of users. A user can be of only one type. That would easily be handled by groups, with a little extra care. However,

Django Multi-Table Inheritance VS Specifying Explicit OneToOne Relationship in Models

由 社会主义新天地 提交于 2019-12-02 15:18:19
Hope all this makes sense :) I'll clarify via comments if necessary. Also, I am experimenting using bold text in this question, and will edit it out if I (or you) find it distracting. With that out of the way... Using django.contrib.auth gives us User and Group, among other useful things that I can't do without (like basic messaging). In my app I have several different types of users. A user can be of only one type. That would easily be handled by groups, with a little extra care. However, these different users are related to each other in hierarchies / relationships. Let's take a look at
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