func (j *Join) JoinOne(q *Query) {
q.Table(j.JoinModel.Table().Name + " AS " + j.Rel.Field.SQLName)
q.columns = j.AppendColumns(q.columns)
for _, pk := range j.Rel.Join.PKs {
q.Where(
`?.? = ?.?`,
types.F(j.Rel.Field.SQLName),
types.F(pk.SQLName),
types.F(j.BaseModel.Table().ModelName),
types.F(j.Rel.Field.SQLName+"_"+pk.SQLName),
)
}
}
func F(s string, params ...interface{}) types.F {
b, err := Format(nil, s, params...)
if err != nil {
panic(err)
}
return types.F(b)
}
func (j *Join) selectM2M(db dber) error {
path := j.JoinModel.Path()
path = path[:len(path)-1]
m2mModel := newM2MModel(j)
m2mCols := columns(j.Rel.M2M.ModelName+".", j.Rel.M2MBaseFKs)
m2mVals := values(j.BaseModel.Root(), path, j.BaseModel.Table().PKs)
q := NewQuery(db, m2mModel)
q.Columns("*")
q.Join(
"JOIN ? AS ? ON (?) IN (?)",
types.F(j.Rel.M2M.Name), types.F(j.Rel.M2M.ModelName),
types.Q(m2mCols), types.Q(m2mVals),
)
for i, pk := range j.JoinModel.Table().PKs {
q.Where(
"?.? = ?.?",
types.F(j.JoinModel.Table().ModelName), types.F(pk.SQLName),
types.F(j.Rel.M2M.ModelName), types.F(j.Rel.M2MJoinFKs[i].SQLName),
)
}
err := q.Select()
if err != nil {
return err
}
return nil
}
func (q *Query) Returning(columns ...interface{}) *Query {
for _, column := range columns {
switch column := column.(type) {
case string:
q.returning = append(q.returning, types.F(column))
case types.ValueAppender:
q.returning = append(q.returning, column)
default:
panic(fmt.Sprintf("unsupported column type: %T", column))
}
}
return q
}
func (j *Join) selectMany(db dber) error {
root := j.JoinModel.Root()
path := j.JoinModel.Path()
path = path[:len(path)-1]
manyModel := newManyModel(j)
q := NewQuery(db, manyModel)
q.columns = append(q.columns, types.F(j.JoinModel.Table().ModelName+".*"))
cols := columns(j.JoinModel.Table().ModelName+".", j.Rel.FKs)
vals := values(root, path, j.BaseModel.Table().PKs)
q.Where(`(?) IN (?)`, types.Q(cols), types.Q(vals))
if j.Rel.Polymorphic != "" {
q.Where(`? = ?`, types.F(j.Rel.Polymorphic+"type"), j.BaseModel.Table().ModelName)
}
err := q.Select()
if err != nil {
return err
}
return nil
}
func (q *Query) Columns(columns ...interface{}) *Query {
loop:
for _, column := range columns {
switch column := column.(type) {
case string:
if _, err := q.model.Join(column); err == nil {
continue loop
}
q.columns = append(q.columns, types.F(column))
case types.ValueAppender:
q.columns = append(q.columns, column)
default:
panic(fmt.Sprintf("unsupported column type: %T", column))
}
}
return q
}
func (q *Query) Where(where string, params ...interface{}) *Query {
if false {
for i, param := range params {
if f, ok := param.(types.F); ok {
column, err := q.model.Join(string(f) + "._")
if err == nil {
params[i] = types.F(column)
}
}
}
}
b, err := Format(nil, where, params...)
if err != nil {
q.setErr(err)
} else {
q.wheres = append(q.wheres, b)
}
return q
}
func (j *Join) AppendColumns(columns []types.ValueAppender) []types.ValueAppender {
alias := j.Rel.Field.SQLName
prefix := alias + "__"
if j.SelectAll {
for _, f := range j.JoinModel.Table().Fields {
q := Q("?.? AS ?", types.F(alias), types.F(f.SQLName), types.F(prefix+f.SQLName))
columns = append(columns, q)
}
} else {
for _, column := range j.Columns {
q := Q("?.? AS ?", types.F(alias), types.F(column), types.F(prefix+column))
columns = append(columns, q)
}
}
return columns
}
