Normalize, blame, and format a job's unsaved_error into the stored error format.

Formatted errors are stored in a job's errors field.

@spec new(args(), [option()]) :: changeset()

Construct a new job changeset ready for insertion into the database.

Options

• :max_attempts — the maximum number of times a job can be retried if there are errors during execution

• :meta — a map containing additional information about the job

• :priority — a numerical indicator from 0 to 9 of how important this job is relative to other jobs in the same queue. The lower the number, the higher priority the job.

• :queue — a named queue to push the job into. Jobs may be pushed into any queue, regardless of whether jobs are currently being processed for the queue.

• :replace - a list of keys to replace per state on a unique conflict

• :scheduled_at - a time in the future after which the job should be executed

• :schedule_in - the number of seconds until the job should be executed or a tuple containing a number and unit

• :tags — a list of tags to group and organize related jobs, i.e. to identify scheduled jobs

• :unique — a keyword list of options specifying how uniqueness will be calculated. The options define which fields will be used, for how long, with which keys, and for which states.

• :worker — a module to execute the job in. The module must implement the Oban.Worker behaviour.

Examples

Insert a job with the :default queue:

%{id: 1, user_id: 2}
|> Oban.Job.new(queue: :default, worker: MyApp.Worker)
|> Oban.insert()

Generate a pre-configured job for MyApp.Worker:

MyApp.Worker.new(%{id: 1, user_id: 2})

Schedule a job to run in 5 seconds:

MyApp.Worker.new(%{id: 1}, schedule_in: 5)

Schedule a job to run in 5 minutes:

MyApp.Worker.new(%{id: 1}, schedule_in: {5, :minutes})

Insert a job, ensuring that it is unique within the past minute:

MyApp.Worker.new(%{id: 1}, unique: [period: {1, :minute}])

Insert a unique job where the period is compared to the scheduled_at timestamp rather than inserted_at:

MyApp.Worker.new(%{id: 1}, unique: [period: 60, timestamp: :scheduled_at])

Insert a unique job based only on the worker field, and within multiple states:

fields = [:worker]
states = [:available, :scheduled, :executing, :retryable, :completed]

MyApp.Worker.new(%{id: 1}, unique: [fields: fields, period: 60, states: states])

Insert a unique job considering only the worker and specified keys in the args:

keys = [:account_id, :url]
args = %{account_id: 1, url: "https://example.com"}

MyApp.Worker.new(args, unique: [fields: [:args, :worker], keys: keys])

Insert a unique job considering only specified keys in the meta:

unique = [fields: [:meta], keys: [:slug]]

MyApp.Worker.new(%{id: 1}, meta: %{slug: "unique-key"}, unique: unique)

A canonical list of all possible job states.

This may be used to build up :unique options without duplicating states in application code.

Examples

iex> Oban.Job.states() -- [:completed, :discarded]
[:scheduled, :available, :executing, :retryable, :cancelled]

Job State Transitions

• :scheduled—Jobs inserted with scheduled_at in the future are :scheduled. After the scheduled_at time has elapsed the Oban.Plugins.Stager will transition them to :available

• :available—Jobs without a future scheduled_at timestamp are inserted as :available and may execute immediately

• :executing—Available jobs may be ran, at which point they are :executing

• :retryable—Jobs that fail and haven't exceeded their max attempts are transitioned to :retryable and rescheduled until after a backoff period. Once the backoff has elapsed the Oban.Plugins.Stager will transition them back to :available

• :completed—Jobs that finish executing succesfully are marked :completed

• :discarded—Jobs that fail and exhaust their max attempts, or return a :discard tuple during execution, are marked :discarded

• :cancelled—Jobs that are cancelled intentionally

@spec to_map(Ecto.Changeset.t(t())) :: map()

Convert a Job changeset into a map suitable for database insertion.

Examples

Convert a worker generated changeset into a plain map:

%{id: 123}
|> MyApp.Worker.new()
|> Oban.Job.to_map()