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upsert.go
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/
upsert.go
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package helpers
import (
"context"
"code.cloudfoundry.org/lager"
)
// Upsert insert a record if it doesn't exist or update the record if one
// already exists. Returns true if a new record was inserted in the database.
func (h *sqlHelper) Upsert(
ctx context.Context,
logger lager.Logger,
q Queryable,
table string,
attributes SQLAttributes,
wheres string,
whereBindings ...interface{},
) (bool, error) {
res, err := h.Update(
ctx,
logger,
q,
table,
attributes,
wheres,
whereBindings...,
)
if err != nil {
return false, err
}
rowsAffected, err := res.RowsAffected()
if err != nil {
// this should never happen
logger.Error("failed-getting-rows-affected", err)
return false, err
}
if rowsAffected > 0 {
return false, nil
}
res, err = h.Insert(
ctx,
logger,
q,
table,
attributes,
)
if err != nil {
return false, err
}
return true, nil
}