Relation

Example relation field. Note:

• Source relation - it mean relation Master model
• Target relation - it mean relation Slave model

    ...
      profile: {
        indexed: true,
        relation: {
          hasOne: 'StudentProfile#',
        },
      },
    ...

Noote: field with relation section should contain flag indexed: true.

Relation section can contain:

• hasOne or hasMany(Source relation) or belongsTo or belongsToMany(Target relation) - type of relation
• oposite - use only with Target relation. It conain name of field in Source relation's entity where it relation can be find.

• using - use only for many-to-many relations. It contain:

    using: 'NameTableBundle#idFieldName'
  

  1) <NameTableBundle> - name of table bundle. It entity can be create manualy or ODA create it automaticaly 2) <idFieldName> - name of id that use for bind or empty. Note: By default <idfieldName> is 'id'. Leave the field empty:

     using: 'NameTableBundle#'
  

Type of relations:

ODA use one-to-one(1 : 1), one-to-many(1 : n) and many-to-many(m : n) relations

Relation one-to-one(1 : 1)

Description points of relation.

Example: Student relations with StudentProfile.
File Student.ts:

    ...
    profile: {
      indexed: true,
      relation: {
        hasOne: 'StudentProfile#',
      },
    },
    ...

File StudentProfile.ts:

    ...
    student: {
      indexed: true,
      relation: {
        belongsTo: 'Student#',
        opposite: 'profile',
      },
    },
    ...

All descriptions you can find by link One-To-One Associations

Relation one-to-many(1 : n)

StudentsGroup has many Students. Student belongs to one StudentsGroup.
File StudentsGroup.ts:

    ...
    students: {
      indexed: true,
      relation: {
        hasMany: 'Student#',
      },
    },
    ...

File Student.ts:

    ...
    group: {
      indexed: true,
      relation: {
        belongsTo: 'StudentsGroup#',
        opposite: 'students',
      },
    },
    ...

All descriptions you can find by link One-To-Many Associations

Relation one-to-many(m : n)

StudentsGroup relations with Subjects.
File StudentsGroup.ts:

    ...
    subjects: {
      indexed: true,
      relation: {
        belongsToMany: 'Subject#',
        using: 'StudentsGroupSubject#',
        opposite: 'groups',
      },
    },
    ...

File Subject.ts:

    ...
    groups: {
      indexed: true,
      relation: {
        belongsToMany: 'StudentsGroup#',
        using: 'StudentsGroupSubject#',
      },
    },
    ...

All descriptions you can find by link Many-To-Many Associations