an object of key value pairs
A dummy variable that doesn't exist on the real object. This exists so Typescript can infer the type of the attributes in static functions. Don't try to access this!
Before using these, I'd tried typing out the functions without them, but
Typescript fails to infer TAttributes in signatures like the below.
public static findOne<M extends Model<TAttributes>, TAttributes>(
this: { new(): M },
options: NonNullFindOptions<TAttributes>
): Promise<M>;A similar dummy variable that doesn't exist on the real object. Do not try to access this in real code.
A dummy variable that doesn't exist on the real object. This exists so Typescript can infer the type of the attributes in static functions. Don't try to access this!
Returns true if this instance has not yet been persisted to the database
A reference to the sequelize instance
An object hash from alias to association object
The options that the model was initialized with
The name of the primary key attribute
The name of the primary key attributes
The attributes of the model
Reference to the sequelize instance the model was initialized with
The name of the database table
Add a hook to the model
Provide a name for the hook function. It can be used to remove the hook later or to order hooks based on some sort of priority system in the future.
If changed is called with a string it will return a boolean indicating whether the value of that key in
dataValues is different from the value in _previousDataValues.
If changed is called without an argument, it will return an array of keys that have changed.
If changed is called with two arguments, it will set the property to dirty.
If changed is called without an argument and no keys have changed, it will return false.
Decrement the value of one or more columns. This is done in the database, which means it does not use the values currently stored on the Instance. The decrement is done using a
SET column = column - Xquery. To get the correct value after an decrement into the Instance you should do a reload.
instance.decrement('number') // decrement number by 1
instance.decrement(['number', 'count'], { by: 2 }) // decrement number and count by 2
instance.decrement({ answer: 42, tries: 1}, { by: 2 }) // decrement answer by 42, and tries by 1.
// `by` is ignored, since each column has its own
// valueIf a string is provided, that column is decremented by the value of by given in options.
If an array is provided, the same is true for each column.
If and object is provided, each column is decremented by the value given
Destroy the row corresponding to this instance. Depending on your setting for paranoid, the row will either be completely deleted, or have its deletedAt timestamp set to the current time.
Check whether all values of this and other Instance are the same
Check if this is eqaul to one of others by calling equals
If no key is given, returns all values of the instance, also invoking virtual getters.
If key is given and a field or virtual getter is present for the key it will call that getter - else it will return the value for key.
Get the value of the underlying data value
Check whether the mode has any hooks of this type
Increment the value of one or more columns. This is done in the database, which means it does not use the values currently stored on the Instance. The increment is done using a
SET column = column + Xquery. To get the correct value after an increment into the Instance you should do a reload.
instance.increment('number') // increment number by 1
instance.increment(['number', 'count'], { by: 2 }) // increment number and count by 2
instance.increment({ answer: 42, tries: 1}, { by: 2 }) // increment answer by 42, and tries by 1.
// `by` is ignored, since each column has its own
// valueIf a string is provided, that column is incremented by the value of by given in options.
If an array is provided, the same is true for each column.
If and object is provided, each column is incremented by the value given.
Helper method to determine if a instance is "soft deleted". This is particularly useful if the implementer renamed the deletedAt attribute to something different. This method requires paranoid to be enabled.
Throws an error if paranoid is not enabled.
Returns the previous value for key from _previousDataValues.
Refresh the current instance in-place, i.e. update the object with current data from the DB and return
the same object. This is different from doing a find(Instance.id), because that would create and
return a new instance. With this method, all references to the Instance are updated with the new data
and no new objects are created.
Remove hook from the model
Restore the row corresponding to this instance. Only available for paranoid models.
Validates this instance, and if the validation passes, persists it to the database.
Returns a Promise that resolves to the saved instance (or rejects with a Sequelize.ValidationError, which will have a property for each of the fields for which the validation failed, with the error message for that field).
This method is optimized to perform an UPDATE only into the fields that changed. If nothing has changed, no SQL query will be performed.
This method is not aware of eager loaded associations. In other words, if some other model instance (child) was eager loaded with this instance (parent), and you change something in the child, calling save() will simply ignore the change that happened on the child.
Set is used to update values on the instance (the sequelize representation of the instance that is,
remember that nothing will be persisted before you actually call save). In its most basic form set
will update a value stored in the underlying dataValues object. However, if a custom setter function
is defined for the key, that function will be called instead. To bypass the setter, you can pass raw: true in the options object.
If set is called with an object, it will loop over the object, and call set recursively for each key, value pair. If you set raw to true, the underlying dataValues will either be set directly to the object passed, or used to extend dataValues, if dataValues already contain values.
When set is called, the previous value of the field is stored and sets a changed flag(see changed).
Set can also be used to build instances for associations, if you have values for those. When using set with associations you need to make sure the property key matches the alias of the association while also making sure that the proper include options have been set (from .build() or .findOne())
If called with a dot.seperated key on a JSON/JSONB attribute it will set the value nested and flag the entire object as changed.
Update the underlying data value
Convert the instance to a JSON representation. Proxies to calling get with no keys. This means get all
values gotten from the DB, and apply all custom getters.
This is the same as calling set and then calling save.
Validate the attribute of this instance according to validation rules set in the model definition.
Emits null if and only if validation successful; otherwise an Error instance containing { field name : [error msgs] } entries.
Get an object representing the query for this instance, use with options.where
Add a hook to the model
Provide a name for the hook function. It can be used to remove the hook later or to order hooks based on some sort of priority system in the future.
Add a new scope to the model
This is especially useful for adding scopes with includes, when the model you want to
include is not available at the time this model is defined. By default this will throw an
error if a scope with that name already exists. Pass override: true in the options
object to silence this error.
A hook that is run after creating instances in bulk
A callback function that is called with instances, options
A hook that is run after destroying instances in bulk
A callback function that is called with options
A hook that is run after sequelize.sync call
A callback function that is called with options passed to sequelize.sync
A hook that is run after updating instances in bulk
A callback function that is called with options
A hook that is run after creating a single instance
A callback function that is called with attributes, options
A hook that is run after destroying a single instance
A callback function that is called with instance, options
A hook that is run after a find (select) query
A callback function that is called with instance(s), options
A hook that is run after creating or updating a single instance, It proxies afterCreate and afterUpdate
A callback function that is called with instance, options
A hook that is run after Model.sync call
A callback function that is called with options passed to Model.sync
A hook that is run after updating a single instance
A callback function that is called with instance, options
A hook that is run after validation
A callback function that is called with instance, options
Run an aggregation method on the specified field
The field to aggregate over. Can be a field name or *
The function to use for aggregation, e.g. sum, max etc.
Query options. See sequelize.query for full options
Returns the aggregate result cast to options.dataType, unless options.plain is false, in
which case the complete data result is returned.
A hook that is run before creating instances in bulk
A callback function that is called with instances, options
A hook that is run before destroying instances in bulk
A callback function that is called with options
A hook that is run before sequelize.sync call
A callback function that is called with options passed to sequelize.sync
A hook that is run after updating instances in bulk
A callback function that is called with options
A hook that is run before a count query
A callback function that is called with options
A hook that is run before creating a single instance
A callback function that is called with attributes, options
A hook that is run before destroying a single instance
A callback function that is called with instance, options
A hook that is run before a find (select) query
A callback function that is called with options
A hook that is run before a find (select) query, after any { include: {all: ...} } options are expanded
A callback function that is called with options
A hook that is run before a find (select) query, after all option parsing is complete
A callback function that is called with options
A hook that is run before creating or updating a single instance, It proxies beforeCreate and beforeUpdate
A callback function that is called with instance, options
A hook that is run before Model.sync call
A callback function that is called with options passed to Model.sync
A hook that is run before updating a single instance
A callback function that is called with instance, options
A hook that is run before validation
A callback function that is called with instance, options
Creates an association between this (the source) and the provided target. The foreign key is added on the source.
Example: Profile.belongsTo(User). This will add userId to the profile table.
The model that will be associated with hasOne relationship
Options for the association
Create an N:M association with a join table
User.belongsToMany(Project)
Project.belongsToMany(User)By default, the name of the join table will be source+target, so in this case projectsusers. This can be
overridden by providing either a string or a Model as through in the options.
If you use a through model with custom attributes, these attributes can be set when adding / setting new associations in two ways. Consider users and projects from before with a join table that stores whether the project has been started yet:
class UserProjects extends Model {}
UserProjects.init({
started: Sequelize.BOOLEAN
}, { sequelize });
User.belongsToMany(Project, { through: UserProjects })
Project.belongsToMany(User, { through: UserProjects })jan.addProject(homework, { started: false }) // The homework project is not started yet
jan.setProjects([makedinner, doshopping], { started: true}) // Both shopping and dinner has been startedIf you want to set several target instances, but with different attributes you have to set the attributes on the instance, using a property with the name of the through model:
p1.userprojects {
started: true
}
user.setProjects([p1, p2], {started: false}) // The default value is false, but p1 overrides that.Similarily, when fetching through a join table with custom attributes, these attributes will be available as an object with the name of the through model.
user.getProjects().then(projects => {
const p1 = projects[0]
p1.userprojects.started // Is this project started yet?
})The model that will be associated with hasOne relationship
Options for the association
Builds a new model instance. Values is an object of key value pairs, must be defined but can be empty.
Undocumented bulkBuild
Create and insert multiple instances in bulk.
The success handler is passed an array of instances, but please notice that these may not completely represent the state of the rows in the DB. This is because MySQL and SQLite do not make it easy to obtain back automatically generated IDs and other default values in a way that can be mapped to multiple records. To obtain Instances for the newly created values, you will need to query for them again.
List of objects (key/value pairs) to create instances from
Count number of records if group by is used
Count the number of records matching the provided where clause.
If you provide an include option, the number of matching associations will be counted instead.
Builds a new model instance and calls save on it.
Run a describe query on the table. The result will be return to the listener as a hash of attributes and their types.
Delete multiple instances, or set their deletedAt timestamp to the current time if paranoid is enabled.
Promise
Drop the table represented by this Model
Search for multiple instances.
Simple search using AND and =
Model.findAll({
where: {
attr1: 42,
attr2: 'cake'
}
})WHERE attr1 = 42 AND attr2 = 'cake'Using greater than, less than etc.
Model.findAll({
where: {
attr1: {
gt: 50
},
attr2: {
lte: 45
},
attr3: {
in: [1,2,3]
},
attr4: {
ne: 5
}
}
})WHERE attr1 > 50 AND attr2 <= 45 AND attr3 IN (1,2,3) AND attr4 != 5Possible options are: [Op.ne], [Op.in], [Op.not], [Op.notIn], [Op.gte], [Op.gt], [Op.lte], [Op.lt], [Op.like], [Op.ilike]/[Op.iLike], [Op.notLike], [Op.notILike], '..'/[Op.between], '!..'/[Op.notBetween], '&&'/[Op.overlap], '@>'/[Op.contains], '<@'/[Op.contained]
Queries using OR
Model.findAll({
where: Sequelize.and(
{ name: 'a project' },
Sequelize.or(
{ id: [1,2,3] },
{ id: { gt: 10 } }
)
)
})WHERE name = 'a project' AND (id` IN (1,2,3) OR id > 10)The success listener is called with an array of instances if the query succeeds.
Find all the rows matching your query, within a specified offset / limit, and get the total number of rows matching your query. This is very usefull for paging
Model.findAndCountAll({
where: ...,
limit: 12,
offset: 12
}).then(result => {
...
})In the above example, result.rows will contain rows 13 through 24, while result.count will return
the
total number of rows that matched your query.
When you add includes, only those which are required (either because they have a where clause, or
because
required is explicitly set to true on the include) will be added to the count part.
Suppose you want to find all users who have a profile attached:
User.findAndCountAll({
include: [
{ model: Profile, required: true}
],
limit: 3
});Because the include for Profile has required set it will result in an inner join, and only the users
who have a profile will be counted. If we remove required from the include, both users with and
without
profiles will be counted
Search for a single instance by its primary key. This applies LIMIT 1, so the listener will always be called with a single instance.
A more performant findOrCreate that will not work under a transaction (at least not in postgres) Will execute a find call, if empty then attempt to create, if unique constraint then attempt to find again
Search for a single instance. Returns the first instance found, or null if none can be found.
Find a row that matches the query, or build (but don't save) the row if none is found.
The successfull result of the promise will be (instance, initialized) - Make sure to use .then(([...]))
Find a row that matches the query, or build and save the row if none is found
The successful result of the promise will be (instance, created) - Make sure to use .then(([...]))
If no transaction is passed in the options object, a new transaction will be created internally, to
prevent the race condition where a matching row is created by another connection after the find but
before the insert call. However, it is not always possible to handle this case in SQLite, specifically
if one transaction inserts and another tries to select before the first one has comitted. In this case,
an instance of sequelize.TimeoutError will be thrown instead. If a transaction is created, a savepoint
will be created instead, and any unique constraint violation will be handled internally.
Get the tablename of the model, taking schema into account. The method will return The name as a string
if the model has no schema, or an object with tableName, schema and delimiter properties.
Check whether the mode has any hooks of this type
Create an association that is either 1:m or n:m.
// Create a 1:m association between user and project
User.hasMany(Project)// Create a n:m association between user and project
User.hasMany(Project)
Project.hasMany(User)By default, the name of the join table will be source+target, so in this case projectsusers. This can be
overridden by providing either a string or a Model as through in the options. If you use a through
model with custom attributes, these attributes can be set when adding / setting new associations in two
ways. Consider users and projects from before with a join table that stores whether the project has been
started yet:
class UserProjects extends Model {}
UserProjects.init({
started: Sequelize.BOOLEAN
}, { sequelize })
User.hasMany(Project, { through: UserProjects })
Project.hasMany(User, { through: UserProjects })jan.addProject(homework, { started: false }) // The homework project is not started yet
jan.setProjects([makedinner, doshopping], { started: true}) // Both shopping and dinner have been
startedIf you want to set several target instances, but with different attributes you have to set the attributes on the instance, using a property with the name of the through model:
p1.userprojects {
started: true
}
user.setProjects([p1, p2], {started: false}) // The default value is false, but p1 overrides that.Similarily, when fetching through a join table with custom attributes, these attributes will be available as an object with the name of the through model.
user.getProjects().then(projects => {
const p1 = projects[0]
p1.userprojects.started // Is this project started yet?
})The model that will be associated with hasOne relationship
Options for the association
Creates an association between this (the source) and the provided target. The foreign key is added on the target.
Example: User.hasOne(Profile). This will add userId to the profile table.
The model that will be associated with hasOne relationship
Options for the association
Increments a single field.
Increments multiple fields by the same value.
Increments multiple fields by different values.
Initialize a model, representing a table in the DB, with attributes and options.
The table columns are define by the hash that is given as the second argument. Each attribute of the hash represents a column. A short table definition might look like this:
Project.init({
columnA: {
type: Sequelize.BOOLEAN,
validate: {
is: ['[a-z]','i'], // will only allow letters
max: 23, // only allow values <= 23
isIn: {
args: [['en', 'zh']],
msg: "Must be English or Chinese"
}
},
field: 'column_a'
// Other attributes here
},
columnB: Sequelize.STRING,
columnC: 'MY VERY OWN COLUMN TYPE'
}, {sequelize})
sequelize.models.modelName // The model will now be available in models under the class nameAs shown above, column definitions can be either strings, a reference to one of the datatypes that are predefined on the Sequelize constructor, or an object that allows you to specify both the type of the column, and other attributes such as default values, foreign key constraints and custom setters and getters.
For a list of possible data types, see https://sequelize.org/master/en/latest/docs/models-definition/#data-types
For more about getters and setters, see https://sequelize.org/master/en/latest/docs/models-definition/#getters-setters
For more about instance and class methods, see https://sequelize.org/master/en/latest/docs/models-definition/#expansion-of-models
For more about validation, see https://sequelize.org/master/en/latest/docs/models-definition/#validations
An object, where each attribute is a column of the table. Each column can be either a DataType, a string or a type-description object, with the properties described below:
These options are merged with the default define options provided to the Sequelize constructor
Return the initialized model
Find the maximum value of field
Find the minimum value of field
Remove attribute from model definition
Remove hook from the model
Restore multiple instances if paranoid is enabled.
Apply a schema to this model. For postgres, this will actually place the schema in front of the table name
"schema"."tableName", while the schema will be prepended to the table name for mysql and
sqlite - 'schema.tablename'.The name of the schema
Apply a scope created in define to the model. First let's look at how to create scopes:
class MyModel extends Model {}
MyModel.init(attributes, {
defaultScope: {
where: {
username: 'dan'
},
limit: 12
},
scopes: {
isALie: {
where: {
stuff: 'cake'
}
},
complexFunction(email, accessLevel) {
return {
where: {
email: {
[Op.like]: email
},
accesss_level {
[Op.gte]: accessLevel
}
}
}
}
},
sequelize,
})Now, since you defined a default scope, every time you do Model.find, the default scope is appended to your query. Here's a couple of examples:
Model.findAll() // WHERE username = 'dan'
Model.findAll({ where: { age: { gt: 12 } } }) // WHERE age > 12 AND username = 'dan'To invoke scope functions you can do:
Model.scope({ method: ['complexFunction' 'dan@sequelize.com', 42]}).findAll()
// WHERE email like 'dan@sequelize.com%' AND access_level >= 42Model A reference to the model, with the scope(s) applied. Calling scope again on the returned model will clear the previous scope.
Find the sum of field
Sync this Model to the DB, that is create the table. Upon success, the callback will be called with the model instance (this)
Truncate all instances of the model. This is a convenient method for Model.destroy({ truncate: true }).
Unscope the model
Update multiple instances that match the where options. The promise returns an array with one or two
elements. The first element is always the number of affected rows, while the second element is the actual
affected rows (only supported in postgres and mssql with options.returning true.)
Insert or update a single row. An update will be executed if a row which matches the supplied values on either the primary key or a unique key is found. Note that the unique index must be defined in your sequelize model and not just in the table. Otherwise you may experience a unique constraint violation, because sequelize fails to identify the row that should be updated.
Implementation details:
INSERT values ON DUPLICATE KEY UPDATE valuesINSERT; UPDATE. This means that the update is executed
regardless
of whether the row already existed or notNote that SQLite returns null for created, no matter if the row was created or updated. This is because SQLite always runs INSERT OR IGNORE + UPDATE, in a single query, so there is no way to know whether the row was inserted or not.
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Builds a new model instance.