Changeset

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Crecto

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Changeset

The changeset performs validations on data objects.  If any changeset is not valid, then the database operation will not happen.
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user = User.new
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changeset = User.changeset(user)
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changeset.valid?
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Repo operations on single instances will also return a changeset, where you can check is validity and also check for error messages and constraint error messages.
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user = User.new
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changeset = Repo.insert(user)
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changeset.errors.any?
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Changeset methods
errors
An array of validation and constraint errors
valid?
Returns whether the changeset is valid not
instance
The new object instance after the database operation
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user = User.new
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changeset = Repo.insert(user)
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changeset.instance.id # new database id
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action
Action performed on the changeset afer the database operation :insert, :update, etc
changes
An array of field changes on the data object
source
A hash of the original data set

Database Operations

Multi / Transactions

Last modified 4yr ago

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Contents

Changeset methods

`errors`

`valid?`

`instance`

`action`

`changes`

`source`