I am tryiong to generate a BINARY(16) value for a model that Id.
I used the defaultValue parameter but ended up getting
duplicate key errors in mysql
.
So i found If I use beforeCreate then it would be uniqe every time but when Im doing the actual create im getting
Id can not be null errors
my model:
const utility = require('utils/utilities');
module.exports = function(sequelize, DataTypes) {
const weddings = sequelize.define(
'weddings', {
Id: {
primaryKey: true,
allowNull: false,
type: 'BINARY(16)',
},
Name: {
type: DataTypes.STRING(150),
allowNull: false,
comment: 'null',
},
HouseId: {
type: DataTypes.INTEGER(11),
allowNull: false,
comment: 'null',
references: {
model: 'house',
key: 'Id',
},
},
WDate: {
type: DataTypes.DATE,
allowNull: false,
comment: 'null',
},
Active: {
type: DataTypes.BOOLEAN,
allowNull: false,
comment: 'null',
},
},
{
hooks: {
beforeCreate() {
const generateValue = Buffer.from(utility.generateUID().replace('-', ''), 'hex');
weddings.Id = generateValue;
}
}
}, {
tableName: 'weddings',
}
);
return weddings;
};
error:
weddings.Id cannot be null
What am I missing?
You can use instance hook like this:
const utility = require('utils/utilities');
module.exports = function(sequelize, DataTypes) {
const weddings = sequelize.define(
'weddings', {
Id: {
primaryKey: true,
allowNull: false,
type: 'BINARY(16)',
},
Name: {
type: DataTypes.STRING(150),
allowNull: false,
comment: 'null',
},
HouseId: {
type: DataTypes.INTEGER(11),
allowNull: false,
comment: 'null',
references: {
model: 'house',
key: 'Id',
},
},
WDate: {
type: DataTypes.DATE,
allowNull: false,
comment: 'null',
},
Active: {
type: DataTypes.BOOLEAN,
allowNull: false,
comment: 'null',
},
},
{
}, {
tableName: 'weddings',
}
);
weddings.beforeCreate(async (data, options) => {
data.Id = await Buffer.from(utility.generateUID().replace('-', ''), 'hex');
});
return weddings;
};
If you want to emit hooks for each individual record, along with the bulk hooks you can pass individualHooks: true to the call.
table.update( req.body, {
where: where,
returning: true,
individualHooks: true
plain: true
})
create:
db.weddings.create({
...args,
}),
for other information you can read it at:
https://sequelize.org/v5/manual/hooks.html
Related
I have two tables in a MySQL schema, 'members' and 'events', which share a many-to-many relationship. I am attempting to model that relationship using Sequelize via a junction table containing a member_id and an event_id (which correspond to columns in the Members and Events tables respectively) and an event_date - the date when an event is attended by many members.
I am following the guidance in the Sequelize 'Advanced Associations' section (link), but am getting an error when my node.js server attempts to start, as follows:
Members.belongsToMany(models.Events, { through: 'member_events' })
^
TypeError: Members.belongsToMany is not a function
I'm really stuggling to understand what specifically this means and how I can address the issue. The following is my code for the three models in question:
memberEvents.js
module.exports = (sequelize, DataTypes) => {
const Members = require('../models/members')
const Events = require('../models/events')
const MemberEvents = sequelize.define(
"MemberEvents",
{
member_id: {
type: DataTypes.INTEGER,
allowNull: false,
primaryKey: true,
},
event_id: {
type: DataTypes.INTEGER,
allowNull: false,
primaryKey: true,
},
event_date: {
type: DataTypes.DATEONLY,
allowNull: false,
primaryKey: true,
},
},
{ tableName: "member_events" }
);
Members.belongsToMany(Events, { through: 'member_events' })
Events.belongsToMany(Members, { through: 'member_events' })
return MemberEvents;
};
Members.js
module.exports = (sequelize, DataTypes) => {
//Below creates the member table in the schema
const Members = sequelize.define(
"Members",
{
member_id: {
type: DataTypes.INTEGER,
autoIncrement: true,
allowNull: false,
primaryKey: true,
},
forename: {
type: DataTypes.STRING(35),
allowNull: false,
},
surname: {
type: DataTypes.STRING(35),
allowNull: false,
},
date_of_birth: {
type: DataTypes.DATEONLY,
allowNull: false,
},
address_1: {
type: DataTypes.STRING(35),
allowNull: false,
},
address_2: {
type: DataTypes.STRING(35),
},
address_3: {
type: DataTypes.STRING(35),
},
address_4: {
type: DataTypes.STRING(35),
},
address_5: {
type: DataTypes.STRING(35),
},
postcode: {
type: DataTypes.STRING(12),
allowNull: false,
},
directions: {
type: DataTypes.TEXT("long"),
},
mobile_phone: {
type: DataTypes.STRING(12),
},
email_address: {
type: DataTypes.STRING(255),
},
key_safe_code: {
type: DataTypes.STRING(8),
},
next_of_kin_name: {
type: DataTypes.STRING(70),
},
next_of_kin_phone: {
type: DataTypes.STRING(12),
},
next_of_kin_local: {
type: DataTypes.STRING(33),
},
next_of_kin_relationship: {
type: DataTypes.STRING(40),
},
doctor_name: {
type: DataTypes.STRING(35),
},
initial_medical_conditions: {
type: DataTypes.TEXT("long"),
},
deceased: {
type: DataTypes.DATEONLY,
},
normally_escorted: {
type: DataTypes.STRING(3),
},
blue_badge_holder: {
type: DataTypes.STRING(3),
},
medical_equipment: {
type: DataTypes.STRING,
},
},
{ tableName: "Member" }
);
return Members;
};
Events.js
module.exports = (sequelize, DataTypes) => {
//Below creates the event table in the schema
const Events = sequelize.define(
"Events",
{
event_id: {
type: DataTypes.INTEGER,
autoIncrement: true,
allowNull: false,
primaryKey: true,
},
event_name: {
type: DataTypes.STRING(70),
allowNull: false,
},
staff_id: {
type: DataTypes.INTEGER,
allowNull: false,
},
},
{ tableName: "Events" }
);
return Events;
};
When separating your Sequelize models into separate imports, use the associate function to access the models to make these associations. You also don't need to import the other models into each other.
Something along these lines should work:
TableA.js
module.exports = (sequelize, DataTypes) => {
const TableA = sequelize.define('table_a', {
foobar: DataTypes.STRING,
}, {});
TableA.associate = function(models) {
TableA.belongsTo(models.TableB, { through: 'table_c' });
};
return TableA;
};
TableB.js
module.exports = (sequelize, DataTypes) => {
const TableB = sequelize.define('table_b', {
fazbaz: DataTypes.STRING,
}, {});
TableB.associate = function(models) {
TableB.belongsTo(models.TableA, { through: 'table_c' });
};
return TableB;
};
I dont know why I am getting this error error: SequelizeDatabaseError: Unknown column 'student-> section ->grademapping.studentId' in 'field list' I just follow this documentation on how to use belongsToMany did i miss something on the documentation? https://sebhastian.com/sequelize-belongstomany/
let student = await Database.getConnection().models.Student;
let grademapping = await Database.getConnection().models.Grademapping;
let section = await Database.getConnection().models.Section;
let taxtypemapping = await student.findAll({
attributes:['_id','FirstName','LastName', 'section.Description'],
include:[
{ model: section, attribute:[] }
],
raw: true
})
the models
class taxtypedetails extends Sequelize.Model {}
Section.init(
{
_id: {
type: Sequelize.INTEGER,
primaryKey: true,
autoIncrement: true,
},
Description: {
type: Sequelize.STRING,
},
},
{ sequelize, tableName: 'section', timestamps: false },
)
class Student extends Sequelize.Model {}
Student.init(
{
_id: {
type: Sequelize.INTEGER,
primaryKey: true,
autoIncrement: true,
},
FirstName: {
type: Sequelize.STRING,
},
LastName: {
type: Sequelize.STRING,
},
},
{ sequelize, tableName: 'student', timestamps: false },
)
class Grademapping extends Sequelize.Model {}
Grademapping.init(
{
_id: {
type: Sequelize.INTEGER,
primaryKey: true,
autoIncrement: true,
},
sectionID: {
type: Sequelize.INTEGER,
references: {
model: 'section',
key: '_id',
},
},
studentID: {
type: Sequelize.INTEGER,
references: {
model: 'student',
key: '_id',
},
}
},
{ sequelize, tableName: 'grademapping', timestamps: false },
)
student.belongsToMany(section,{through: grademapping})
section.belongsToMany(student,{through: grademapping})
I followed steps in guide of discord.js
I added this on my models/Users.js
module.exports = (sequelize, DataTypes) => {
return sequelize.define('users', {
user_id: {
type: DataTypes.STRING,
primaryKey: true,
},
balance: {
type: DataTypes.INTEGER,
defaultValue: 0,
allowNull: false,
},
bank: {
type: DataTypes.INTEGER,
defaultValue: 0,
allowNull: false,
},
}, {
timestamps: false,
});
};
And this to my index.js
Reflect.defineProperty(client.currency, 'getBank', {
value: function getBank(id) {
const user = client.currency.get(id);
return user ? user.bank : 0;
},
});
I get this error:
UnhandledPromiseRejectionWarning: SequelizeDatabaseError: SQLITE_ERROR: no such column: bank
I’m new with sequelize I’m trying to make a request with associate tables
I have a first model called Experience
module.exports = function (sequelize, DataTypes) {
const Experience = sequelize.define('experience', {
internalId: {
type: DataTypes.BIGINT,
unique: true,
allowNull: false,
},
label: {
type: DataTypes.STRING,
unique: false,
allowNull: false,
},
picture: {
type: DataTypes.TEXT,
unique: false,
allowNull: true,
},
type: {
type: DataTypes.STRING,
validate: {
isIn: {
args: [[
'generic',
'specific',
]],
msg: 'Must be a valid type',
},
},
unique: false,
allowNull: true,
},
author: {
type: DataTypes.STRING,
unique: false,
allowNull: true,
defaultValue: 'import',
},
isActive: {
type: DataTypes.BOOLEAN,
defaultValue: true,
},
});
Experience.associate = (models) => {
Experience.belongsToMany(models.Tag, {
as: 'Tags',
through: models.ExperienceTag,
});
};
return Experience;
};
a second called Tags
module.exports = function (sequelize, DataTypes) {
const Tag = sequelize.define('tag', {
internalId: {
type: DataTypes.STRING,
unique: true,
allowNull: false,
},
name: {
type: DataTypes.STRING,
unique: false,
allowNull: false,
},
author: {
type: DataTypes.STRING,
unique: false,
allowNull: true,
defaultValue: 'import',
},
isActive: {
type: DataTypes.BOOLEAN,
defaultValue: true,
},
});
Tag.associate = (models) => {
Tag.belongsToMany(models.Experience, {
as: 'Experiences',
through: models.ExperienceTag,
});
};
return Tag;
};
The association table name was ExperienceTags
I would like get all the Experiencewho have a tagId = 44
This is my request:
Experience.findAll({
include: [{
model: ExperienceTag,
where: { tagId: 44 },
}],
})
.then((results) => {
winston.warn(JSON.stringify(results, null, 2));
res.status(200)
.send(results);
})
.catch(error => res.status(500)
.send({ error: error.toString() }));
But when I execute it I have an error like:
{
"error": "SequelizeEagerLoadingError: experienceTag is not associated to experience!"
}
I think you like to include Tag rather than ExperienceTag, the following example may help you
Experience.findAll({
include: [{
model: Tag, //model name which you want to include
as: 'Tags', // you have to pass alias as you used while defining
where: { tagId: 44 },
}],
})
I think , you need to add as: 'Experiences' , in your include as you have defined association with alias
Change this
Experience.findAll({
include: [{
model: ExperienceTag,
where: { tagId: 44 },
}],
})
With
Experience.findAll({
include: [{
model: ExperienceTag,
as: 'Experiences', // <---- HERE
where: { tagId: 44 },
}],
})
I have some issue with getting full data from db.
That are my models:
User
module.exports = function(sequelize, DataTypes) {
return sequelize.define('user', {
id: {
type: DataTypes.INTEGER(11),
allowNull: false,
primaryKey: true,
autoIncrement: true,
field: 'ID'
},
password: {
type: DataTypes.STRING(255),
allowNull: false,
field: 'password'
},
email: {
type: DataTypes.STRING(255),
allowNull: false,
unique: true,
field: 'email'
},
roleId: {
type: DataTypes.INTEGER(11),
allowNull: false,
references: {
model: 'role',
key: 'ID'
},
field: 'role_id'
}
}, {
timestamps: false,
tableName: 'user'
});
};
Role
module.exports = function(sequelize, DataTypes) {
return sequelize.define('role', {
id: {
type: DataTypes.INTEGER(11),
allowNull: false,
primaryKey: true,
autoIncrement: true,
field: 'ID'
},
name: {
type: DataTypes.STRING(255),
allowNull: false,
unique: true,
field: 'name'
},
description: {
type: DataTypes.STRING(255),
allowNull: false,
field: 'description'
},
permission: {
type: DataTypes.INTEGER(11),
allowNull: false,
field: 'permission'
}
}, {
timestamps: false,
tableName: 'role',
});};
I want to get object of one specific user including all role content.
Somethink like
{
id: 4,
password: 'xxx',
email: 'adsads#saas.com',
role: {
id: 2,
name: 'admin'
description: 'ipsum ssaffa',
permission: 30
}
}
So I'm using:
User.findOne( { where: { id: req.userId }, include: [ Role ] } ).then( user =>{...});
but I get in the result err.message: "role is not associated to user"
And the simple question - what's wrong ? :)
*to handle models I'm using sequelize-cli
You get this error because you didn't add associate between the models
base on your json I see that each user only has one role, so you can either use belongsTo in role model or hasOne in user model
Should be something like this:
User.js
module.exports = function(sequelize, DataTypes) {
var user = sequelize.define('user', {
id: {
type: DataTypes.INTEGER(11),
allowNull: false,
primaryKey: true,
autoIncrement: true,
field: 'ID'
},
password: {
type: DataTypes.STRING(255),
allowNull: false,
field: 'password'
},
email: {
type: DataTypes.STRING(255),
allowNull: false,
unique: true,
field: 'email'
},
roleId: {
type: DataTypes.INTEGER(11),
allowNull: false,
references: {
model: 'role',
key: 'ID'
},
field: 'role_id'
}
}, {
timestamps: false,
tableName: 'user'
});
user.associate = function(models) {
user.hasOne(models.role, {foreignKey: 'id',sourceKey: 'roleId'});
}
return user;
};
Role.js
module.exports = function(sequelize, DataTypes) {
var role = sequelize.define('role', {
id: {
type: DataTypes.INTEGER(11),
allowNull: false,
primaryKey: true,
autoIncrement: true,
field: 'ID'
},
name: {
type: DataTypes.STRING(255),
allowNull: false,
unique: true,
field: 'name'
},
description: {
type: DataTypes.STRING(255),
allowNull: false,
field: 'description'
},
permission: {
type: DataTypes.INTEGER(11),
allowNull: false,
field: 'permission'
}
}, {
timestamps: false,
tableName: 'role',
});
role.associate = function(models) {
user.belongsTo(models.role, {foreignKey: 'id'});
}
return role;
};
You have to declare associations between your Models. If using Sequelize CLI make sure the static method associate is being called. Example:
/models.index.js
const Category = require('./Category');
const Product = require('./Product');
const ProductTag = require('./ProductTag');
const Tag = require('./Tag');
Category.associate({Product});
Product.associate({Category,Tag});
Tag.associate({Product});
module.exports={Category,Product,ProductTag,Tag};
and then the association in Category.js
'use strict';
const {Model,DataTypes} = require('sequelize');
const sequelize = require('../config/connection.js');
class Category extends Model {
/**
* Helper method for defining associations.
* This method is not a part of Sequelize lifecycle.
* The `models/index` file will call this method.
*/
static associate({Product}) {
// define association here
console.log('Category associated with: Product');
this.hasMany(Product, {
foreignKey: 'category_id',
onDelete: 'CASCADE'
});
}
}
Category.init({
category_id: {type: DataTypes.INTEGER, autoIncrement: true, allowNull: false, primaryKey: true},
category_name: {type: DataTypes.STRING, allowNull: false}
}, {
sequelize,
timestamps: false,
freezeTableName: true,
underscored: true,
modelName: "Category",
});
module.exports = Category;