35 lines
996 B
Go
35 lines
996 B
Go
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package memdb
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// Changes describes a set of mutations to memDB tables performed during a
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// transaction.
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type Changes []Change
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// Change describes a mutation to an object in a table.
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type Change struct {
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Table string
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Before interface{}
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After interface{}
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// primaryKey stores the raw key value from the primary index so that we can
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// de-duplicate multiple updates of the same object in the same transaction
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// but we don't expose this implementation detail to the consumer.
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primaryKey []byte
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}
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// Created returns true if the mutation describes a new object being inserted.
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func (m *Change) Created() bool {
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return m.Before == nil && m.After != nil
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}
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// Updated returns true if the mutation describes an existing object being
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// updated.
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func (m *Change) Updated() bool {
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return m.Before != nil && m.After != nil
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}
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// Deleted returns true if the mutation describes an existing object being
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// deleted.
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func (m *Change) Deleted() bool {
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return m.Before != nil && m.After == nil
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}
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