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column.go
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column.go
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package schema
import (
"fmt"
"github.com/abibby/bob/builder"
"github.com/abibby/bob/dialects"
)
type ColumnBuilder struct {
name string
datatype dialects.DataType
nullable bool
primary bool
autoIncrement bool
change bool
defaultValue any
afterColumn string
unique bool
defaultCurrentTime bool
index bool
}
func NewColumn(name string, datatype dialects.DataType) *ColumnBuilder {
return &ColumnBuilder{
name: name,
datatype: datatype,
}
}
var _ builder.ToSQLer = &ColumnBuilder{}
func (b *ColumnBuilder) Equals(newB *ColumnBuilder) bool {
return b.datatype == newB.datatype &&
b.nullable == newB.nullable &&
b.autoIncrement == newB.autoIncrement &&
b.index == newB.index &&
b.name == newB.name &&
b.primary == newB.primary
}
func (b *ColumnBuilder) Name() string {
return b.name
}
func (b *ColumnBuilder) Nullable() *ColumnBuilder {
b.nullable = true
return b
}
func (b *ColumnBuilder) NotNullable() *ColumnBuilder {
b.nullable = false
return b
}
func (b *ColumnBuilder) Primary() *ColumnBuilder {
b.primary = true
return b
}
func (b *ColumnBuilder) AutoIncrement() *ColumnBuilder {
b.autoIncrement = true
return b
}
func (b *ColumnBuilder) After(column string) *ColumnBuilder {
b.afterColumn = column
return b
}
func (b *ColumnBuilder) Change() *ColumnBuilder {
b.change = true
return b
}
func (b *ColumnBuilder) Default(v any) *ColumnBuilder {
b.defaultValue = v
return b
}
func (b *ColumnBuilder) Type(datatype dialects.DataType) *ColumnBuilder {
b.datatype = datatype
return b
}
func (b *ColumnBuilder) Unique() *ColumnBuilder {
b.unique = true
return b
}
func (b *ColumnBuilder) DefaultCurrentTime() *ColumnBuilder {
b.defaultCurrentTime = true
return b
}
func (b *ColumnBuilder) Index() *ColumnBuilder {
b.index = true
return b
}
func (b *ColumnBuilder) ToSQL(d dialects.Dialect) (string, []any, error) {
r := builder.Result()
r.Add(builder.Identifier(b.name))
r.AddString(d.DataType(b.datatype))
if b.autoIncrement {
r.AddString("PRIMARY KEY AUTOINCREMENT")
} else if b.primary {
r.AddString("PRIMARY KEY")
}
if !b.nullable {
r.AddString("NOT NULL")
}
if b.unique {
r.AddString("UNIQUE")
}
if b.defaultValue != nil {
r.AddString("DEFAULT").
AddString(d.Escape(b.defaultValue))
} else if b.defaultCurrentTime {
r.AddString("DEFAULT").
AddString(d.CurrentTime())
}
return r.ToSQL(d)
}
func (b *ColumnBuilder) ToGo() string {
src := ""
if b.primary {
src += ".Primary()"
}
if b.autoIncrement {
src += ".AutoIncrement()"
}
if b.nullable {
src += ".Nullable()"
}
if b.defaultValue != nil {
src += fmt.Sprintf(".Default(%#v)", b.defaultValue)
}
if b.defaultCurrentTime {
src += ".DefaultCurrentTime()"
}
if b.unique {
src += ".Unique()"
}
if b.index {
src += ".Index()"
}
if b.change {
src += ".Change()"
}
return src
}
func (b *CreateTableBuilder) Columns(columns ...*ColumnBuilder) *CreateTableBuilder {
b.blueprint.columns = columns
return b
}
func (b *CreateTableBuilder) AddColumns(columns ...*ColumnBuilder) *CreateTableBuilder {
b.blueprint.columns = append(b.blueprint.columns, columns...)
return b
}