53 lines
1.5 KiB
Go
53 lines
1.5 KiB
Go
package tdb
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import (
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"bytes"
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"errors"
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"fmt"
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"git.keganmyers.com/terribleplan/tdb/stringy"
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)
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var nullishValues [][]byte = [][]byte{
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[]byte(stringy.LiteralUintToString(uint64(0))),
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[]byte(stringy.LiteralIntToString(int64(0))),
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[]byte(""),
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[]byte("nil"),
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[]byte("<nil>"),
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}
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type notNullConstraint struct {
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table *table
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field dbField
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}
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func newNotNullConstraint(table *table, field dbField) (constraintish, error) {
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if table == nil {
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return nil, errors.New("[constraint.notnull] unable to create not-null without table")
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}
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return ¬NullConstraint{
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table: table,
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field: field,
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}, nil
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}
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func (c *notNullConstraint) validateRaw(tx *Tx, foreignKey []byte) error {
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for _, nullishValue := range nullishValues {
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if bytes.Equal(nullishValue, foreignKey) {
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c.table.debugLogf("[constraint.notnull.validateRaw] violation: '%s'.'%s' is null-ish value '%s'", c.table.name, c.field.Name, nullishValue)
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return fmt.Errorf("[constraint.notnull.validateRaw] violation: '%s'.'%s' is null-ish value '%s'", c.table.name, c.field.Name, nullishValue)
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}
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}
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return nil
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}
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func (c *notNullConstraint) validate(tx *Tx, pv dbPtrValue) error {
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c.table.debugLogf("[constraint.notnull.validate] validating not-null for '%s'.'%s'", c.table.name, c.field.Name)
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if pv.dangerous_Field(c.field).IsZero() {
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c.table.debugLogf("[constraint.notnull.validate] violation: '%s'.'%s' is zero value", c.table.name, c.field.Name)
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return fmt.Errorf("[constraint.notnull.validate] violation: '%s'.'%s' is zero value", c.table.name, c.field.Name)
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}
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return nil
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}
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