Ну попробуй залоггировать allSections(вывести в консоль)
Section {
dataValues: {
id: 85,
sectionNumber: '005',
professorId: 18,
courseId: 15,
semesterId: 2,
createdAt: 2020-03-09T16:44:42.000Z,
updatedAt: 2020-03-09T16:44:42.000Z,
CourseId: 15,
ProfessorId: 18,
SemesterId: 2
},
_previousDataValues: {
id: 85,
sectionNumber: '005',
professorId: 18,
courseId: 15,
semesterId: 2,
createdAt: 2020-03-09T16:44:42.000Z,
updatedAt: 2020-03-09T16:44:42.000Z,
CourseId: 15,
ProfessorId: 18,
SemesterId: 2
},
_changed: {},
_modelOptions: {
timestamps: true,
validate: {},
freezeTableName: false,
underscored: false,
paranoid: false,
rejectOnEmpty: false,
whereCollection: null,
schema: null,
schemaDelimiter: '',
defaultScope: {},
scopes: {},
indexes: [],
name: [Object],
omitNull: false,
sequelize: [Sequelize],
hooks: {}
},
_options: {
isNewRecord: false,
_schema: null,
_schemaDelimiter: '',
raw: true,
attributes: [Array]
},
isNewRecord: false
},