entc/gen: move sql-update-one to sqlgraph

This commit is contained in:
Ariel Mashraki
2019-12-18 19:25:46 +02:00
parent 1bbe460259
commit 7fde9b7642
53 changed files with 8834 additions and 7859 deletions

View File

@@ -73,7 +73,7 @@ func ({{ $receiver }} *{{ $builder }}) sqlSave(ctx context.Context) (*{{ $.Name
{{- if and $.ID.UserDefined (or $.ID.IsString $.ID.IsUUID) }}
{{- /* Do nothing, because these 2 types must be supplied by the user. */ -}}
{{- else }}
{{- if and $.ID.UserDefined }}
{{- if $.ID.UserDefined }}
if {{ $.Receiver }}.ID == 0 {
{{- end }}
id := spec.ID.Value.(int64)

View File

@@ -13,327 +13,183 @@ in the LICENSE file in the root directory of this source tree.
{{- $ret := "n" }}{{ if $one }}{{ $ret = $.Receiver }}{{ end }}
func ({{ $receiver }} *{{ $builder }}) sqlSave(ctx context.Context) ({{ $ret }} {{ if $one }}*{{ $.Name }}{{ else }}int{{ end }}, err error) {
var (
builder = sql.Dialect({{ $receiver }}.driver.Dialect())
selector = builder.Select({{ $.Package }}.{{ if $one }}Columns...{{ else }}{{ $.ID.Constant }}{{ end }}).From(builder.Table({{ $.Package }}.Table))
)
{{- if $one }}
{{ $.Package }}.ID({{ $receiver }}.id)(selector)
{{- else }}
for _, p := range {{ $receiver }}.predicates {
p(selector)
spec := &sqlgraph.UpdateSpec{
Node: &sqlgraph.NodeSpec{
Table: {{ $.Package }}.Table,
Columns: {{ $.Package }}.Columns,
ID: &sqlgraph.FieldSpec{
{{- if $one }}
Value: {{ $receiver }}.id,
{{- end }}
Type: field.{{ $.ID.Type.ConstName }},
Column: {{ $.Package }}.{{ $.ID.Constant }},
},
},
}
{{- if not $one }}
if ps := {{ $receiver }}.predicates; len(ps) > 0 {
spec.Predicate = func(selector *sql.Selector) {
for i := range ps {
ps[i](selector)
}
}
}
{{- end }}
rows := &sql.Rows{}
query, args := selector.Query()
if err = {{ $receiver }}.driver.Query(ctx, query, args, rows); err != nil {
return {{ $zero }}, err
}
defer rows.Close()
{{ $typ := "int" }}{{ if $.ID.UserDefined }}{{ $typ = $.ID.Type }}{{ end }}
var ids []{{ $typ }}
for rows.Next() {
var id {{ $typ }}
{{- if $one }}
{{ $.Receiver }} = &{{ $.Name }}{config: {{ $receiver }}.config}
if err := {{ $.Receiver }}.FromRows(rows); err != nil {
return {{ $zero }}, fmt.Errorf("{{ $pkg }}: failed scanning row into {{ $.Name }}: %v", err)
}
{{- if and $.ID.IsString (not $.ID.UserDefined) }}
id = {{ $.Receiver }}.id()
{{- else if or $.ID.IsUUID $.ID.IsInt }}
id = {{ $.Receiver }}.ID
{{- else }}
id = int({{ $.Receiver }}.ID)
{{- end }}
{{- else }}
if err := rows.Scan(&id); err != nil {
return {{ $zero }}, fmt.Errorf("{{ $pkg }}: failed reading id: %v", err)
}
{{- end }}
ids = append(ids, id)
}
{{- if $one }}
switch n := len(ids); {
case n == 0:
return {{ $zero }}, &ErrNotFound{fmt.Sprintf("{{ $.Name }} with id: %v", {{ $receiver }}.id)}
case n > 1:
return {{ $zero }}, fmt.Errorf("{{ $pkg }}: more than one {{ $.Name }} with the same id: %v", {{ $receiver }}.id)
}
{{- else }}
if len(ids) == 0 {
return {{ $zero }}, nil
}
{{- end }}
{{/* if there's something to update, start a transaction. */}}
tx, err := {{ $receiver }}.driver.Tx(ctx)
if err != nil {
return {{ $zero }}, err
}
{{- if $.Fields }}
var (
res sql.Result
updater = builder.Update({{ $.Package }}.Table)
)
{{- if and (not $.ID.IsInt) $.ID.UserDefined }}
idface := make([]interface{}, len(ids))
for i := range ids {
idface[i] = ids[i]
}
updater = updater.Where(sql.In({{ $.Package }}.{{ $.ID.Constant }}, idface...))
{{- else }}
updater = updater.Where(sql.InInts({{ $.Package }}.{{ $.ID.Constant }}, ids...))
{{- end }}
{{- range $_, $f := $.Fields }}
{{- range $_, $f := $.Fields }}
{{- if or (not $f.Immutable) $f.UpdateDefault }}
if value := {{ $receiver }}.{{ $f.BuilderField }}; value != nil {
{{- if $f.IsJSON }}
buf, err := json.Marshal(*value)
if err != nil {
return {{ $zero }}, err
}
updater.Set({{ $.Package }}.{{ $f.Constant }}, buf)
{{- else }}
updater.Set({{ $.Package }}.{{ $f.Constant }}, *value)
{{- end }}
{{- if $one }}
{{ $.Receiver }}.{{ $f.StructField }} = {{ if not $f.Nillable }}*{{ end }}value
{{- end }}
spec.Fields.Set = append(spec.Fields.Set, &sqlgraph.FieldSpec{
Type: field.{{ $f.Type.ConstName }},
Value: *value,
Column: {{ $.Package }}.{{ $f.Constant }},
})
}
{{- if $f.Type.Numeric }}
if value := {{ $receiver }}.add{{ $f.BuilderField }}; value != nil {
updater.Add({{ $.Package }}.{{ $f.Constant }}, *value)
{{- if $one }}
{{- if $f.Nillable }}
if {{ $.Receiver }}.{{ $f.StructField }} != nil {
*{{ $.Receiver }}.{{ $f.StructField }} += *value
} else {
{{ $.Receiver }}.{{ $f.StructField }} = value
}
{{- else }}
{{ $.Receiver }}.{{ $f.StructField }} += *value
{{- end }}
{{- end }}
spec.Fields.Add = append(spec.Fields.Add, &sqlgraph.FieldSpec{
Type: field.{{ $f.Type.ConstName }},
Value: *value,
Column: {{ $.Package }}.{{ $f.Constant }},
})
}
{{- end }}
{{- end }}
{{- if $f.Optional }}
if {{ $receiver }}.clear{{ $f.BuilderField }} {
{{- if $one }}
{{- if $f.Nillable }}
{{ $.Receiver }}.{{ $f.StructField }} = nil
{{- else }}
var value {{ $f.Type }}
{{ $.Receiver }}.{{ $f.StructField }} = value
{{- end }}
{{- end }}
updater.SetNull({{ $.Package }}.{{ $f.Constant }})
spec.Fields.Clear = append(spec.Fields.Clear, &sqlgraph.FieldSpec{
Type: field.{{ $f.Type.ConstName }},
Column: {{ $.Package }}.{{ $f.Constant }},
})
}
{{- end }}
{{- end }}
if !updater.Empty() {
query, args := updater.Query()
if err := tx.Exec(ctx, query, args, &res); err != nil {
return {{ $zero }}, rollback(tx, err)
}
}
{{- else if $.Edges }}{{/* ent without fields, but with edges */}}
var res sql.Result
{{- end }}
{{- range $_, $e := $.Edges }}
{{- if $e.M2M }}
if len({{ $receiver }}.removed{{ $e.StructField }}) > 0 {
{{- $a := 0 }}{{ $b := 1 }}{{ if $e.IsInverse }}{{ $a = 1 }}{{ $b = 0 }}{{ end }}
eids := make([]int, len({{ $receiver }}.removed{{ $e.StructField }}))
for eid := range {{ $receiver }}.removed{{ $e.StructField }} {
{{- template "dialect/sql/update/convertid" $e -}}
eids = append(eids, eid)
}
query, args := builder.Delete({{ $.Package }}.{{ $e.TableConstant }}).
Where(sql.InInts({{ $.Package }}.{{ $e.PKConstant }}[{{ $a }}], ids...)).
Where(sql.InInts({{ $.Package }}.{{ $e.PKConstant }}[{{ $b }}], eids...)).
Query()
if err := tx.Exec(ctx, query, args, &res); err != nil {
return {{ $zero }}, rollback(tx, err)
}
{{- if $e.SelfRef }}{{/* M2M with self reference */}}{{/* TODO: use OR in the case above. */}}
query, args = builder.Delete({{ $.Package }}.{{ $e.TableConstant }}).
Where(sql.InInts({{ $.Package }}.{{ $e.PKConstant }}[{{ $b }}], ids...)).
Where(sql.InInts({{ $.Package }}.{{ $e.PKConstant }}[{{ $a }}], eids...)).
Query()
if err := tx.Exec(ctx, query, args, &res); err != nil {
return {{ $zero }}, rollback(tx, err)
}
{{- end }}
}
{{- else if $e.O2M }}
if len({{ $receiver }}.removed{{ $e.StructField }}) > 0 {
eids := make([]int, len({{ $receiver }}.removed{{ $e.StructField }}))
for eid := range {{ $receiver }}.removed{{ $e.StructField }} {
{{- template "dialect/sql/update/convertid" $e -}}
eids = append(eids, eid)
}
query, args := builder.Update({{ $.Package }}.{{ $e.TableConstant }}).
SetNull({{ $.Package }}.{{ $e.ColumnConstant }}).
Where(sql.InInts({{ $.Package }}.{{ $e.ColumnConstant }}, ids...)).
Where(sql.InInts({{ $e.Type.Package }}.{{ $e.Type.ID.Constant }}, eids...)).
Query()
if err := tx.Exec(ctx, query, args, &res); err != nil {
return {{ $zero }}, rollback(tx, err)
}
}
{{- else }}{{/* O2O or M2O */}}
{{- if $e.Unique }}
if {{ $receiver }}.cleared{{ $e.StructField }} {
query, args := builder.Update({{ $.Package }}.{{ $e.TableConstant }}).
SetNull({{ $.Package }}.{{ $e.ColumnConstant }}).
Where(sql.InInts({{ $e.Type.Package }}.{{ $e.Type.ID.Constant }}, ids...)).
Query()
if err := tx.Exec(ctx, query, args, &res); err != nil {
return {{ $zero }}, rollback(tx, err)
}
{{- if $e.SelfRef }}{{/* O2O with self reference */}}
query, args = builder.Update({{ $.Package }}.{{ $e.TableConstant }}).
SetNull({{ $.Package }}.{{ $e.ColumnConstant }}).
Where(sql.InInts({{ $.Package }}.{{ $e.ColumnConstant }}, ids...)).
Query()
if err := tx.Exec(ctx, query, args, &res); err != nil {
return {{ $zero }}, rollback(tx, err)
}
{{- with extend $ "Edge" $e }}
{{ template "dialect/sql/defedge" . }}
{{- end }}
spec.Edges.Clear = append(spec.Edges.Clear, edge)
}
{{- else }}
if nodes := {{ $receiver }}.removed{{ $e.StructField }}; len(nodes) > 0 {
{{- with extend $ "Edge" $e "Nodes" true "Zero" $zero }}
{{ template "dialect/sql/defedge" . }}
{{- end }}
spec.Edges.Clear = append(spec.Edges.Clear, edge)
}
{{- end }}
if len({{ $receiver }}.{{ $e.BuilderField }}) > 0 {
{{- if and $e.Unique $e.SelfRef }}{{/* O2O with self reference */}}
if n := len(ids); n > 1 {
return {{ $zero }}, rollback(tx, fmt.Errorf("{{ $pkg }}: can't link O2O edge \"{{ $e.Name }}\" to %d vertices (> 1)", n))
}
for eid := range {{ $receiver }}.{{ $e.BuilderField }} {
{{- template "dialect/sql/update/convertid" $e -}}
query, args := builder.Update({{ $.Package }}.{{ $e.TableConstant }}).
Set({{ $.Package }}.{{ $e.ColumnConstant }}, eid).
Where(sql.EQ({{ $.Package }}.{{ $.ID.Constant }}, ids[0])).Query()
if err := tx.Exec(ctx, query, args, &res); err != nil {
return {{ $zero }}, rollback(tx, err)
}
query, args = builder.Update({{ $.Package }}.{{ $e.TableConstant }}).
Set({{ $.Package }}.{{ $e.ColumnConstant }}, ids[0]).
Where(sql.EQ({{ $e.Type.Package }}.{{ $e.Type.ID.Constant }}, eid).And().IsNull({{ $.Package }}.{{ $e.ColumnConstant }})).Query()
if err := tx.Exec(ctx, query, args, &res); err != nil {
return {{ $zero }}, rollback(tx, err)
}
affected, err := res.RowsAffected()
if err != nil {
return {{ $zero }}, rollback(tx, err)
}
if int(affected) < len({{ $receiver }}.{{ $e.BuilderField }}) {
return {{ $zero }}, rollback(tx, &ConstraintError{msg: fmt.Sprintf("\"{{ $e.Name }}\" (%v) already connected to a different \"{{ $.Name }}\"", eid)})
}
}
{{- else if $e.M2M }}
values := make([][]int, 0, len(ids))
for _, id := range ids {
for eid := range {{ $receiver }}.{{ $e.BuilderField }} {
{{- template "dialect/sql/update/convertid" $e -}}
values = append(values, []int{id, eid}, {{- if $e.SelfRef }}[]int{eid, id}{{ end }}){{/* self-ref creates the edges in both ways. */}}
}
}
{{- $a := 0 }}{{ $b := 1 }}{{ if $e.IsInverse }}{{ $a = 1 }}{{ $b = 0 }}{{ end }}
builder := builder.Insert({{ $.Package }}.{{ $e.TableConstant }}).
Columns({{ $.Package }}.{{ $e.PKConstant }}[{{ $a }}], {{ $.Package }}.{{ $e.PKConstant }}[{{ $b }}])
for _, v := range values {
builder.Values(v[0], v[1])
}
query, args := builder.Query()
if err := tx.Exec(ctx, query, args, &res); err != nil {
return {{ $zero }}, rollback(tx, err)
}
{{- else if $e.M2O }}
for eid := range {{ $receiver }}.{{ $e.BuilderField }} {
{{- template "dialect/sql/update/convertid" $e -}}
query, args := builder.Update({{ $.Package }}.{{ $e.TableConstant }}).
Set({{ $.Package }}.{{ $e.ColumnConstant }}, eid).
Where(sql.InInts({{ $.Package }}.{{ $.ID.Constant }}, ids...)).
Query()
if err := tx.Exec(ctx, query, args, &res); err != nil {
return {{ $zero }}, rollback(tx, err)
}
}
{{- else if $e.O2M }}
for _, id := range ids {
p := sql.P()
for eid := range {{ $receiver }}.{{ $e.BuilderField }} {
{{- template "dialect/sql/update/convertid" $e -}}
p.Or().EQ({{ $e.Type.Package }}.{{ $e.Type.ID.Constant }}, eid)
}
query, args := builder.Update({{ $.Package }}.{{ $e.TableConstant }}).
Set({{ $.Package }}.{{ $e.ColumnConstant }}, id).
Where(sql.And(p, sql.IsNull({{ $.Package }}.{{ $e.ColumnConstant }}))).
Query()
if err := tx.Exec(ctx, query, args, &res); err != nil {
return {{ $zero }}, rollback(tx, err)
}
affected, err := res.RowsAffected()
if err != nil {
return {{ $zero }}, rollback(tx, err)
}
if int(affected) < len({{ $receiver }}.{{ $e.BuilderField }}) {
return {{ $zero }}, rollback(tx, &ConstraintError{msg: fmt.Sprintf("one of \"{{ $e.Name }}\" %v already connected to a different \"{{ $.Name }}\"", keys({{ $receiver }}.{{ $e.BuilderField }}))})
}
}
{{- else }}{{/* O2O */}}
for _, id := range ids {
{{- if $.Type.ID.IsString }}
eid, serr := strconv.Atoi(keys({{ $receiver }}.{{ $e.BuilderField }})[0])
if serr != nil {
return {{ $zero }}, rollback(tx, err)
}
{{- else }}
eid := keys({{ $receiver }}.{{ $e.BuilderField }})[0]
{{- end }}
{{- if $e.IsInverse }}
query, args := builder.Update({{ $.Package }}.{{ $e.TableConstant }}).
Set({{ $.Package }}.{{ $e.ColumnConstant }}, eid).
Where(sql.EQ({{ $.Package }}.{{ $.ID.Constant }}, id).And().IsNull({{ $.Package }}.{{ $e.ColumnConstant }})).
Query()
{{- else }}
query, args := builder.Update({{ $.Package }}.{{ $e.TableConstant }}).
Set({{ $.Package }}.{{ $e.ColumnConstant }}, id).
Where(sql.EQ({{ $e.Type.Package }}.{{ $e.Type.ID.Constant }}, eid).And().IsNull({{ $.Package }}.{{ $e.ColumnConstant }})).
Query()
{{- end }}
if err := tx.Exec(ctx, query, args, &res); err != nil {
return {{ $zero }}, rollback(tx, err)
}
affected, err := res.RowsAffected()
if err != nil {
return {{ $zero }}, rollback(tx, err)
}
if int(affected) < len({{ $receiver }}.{{ $e.BuilderField }}) {
return {{ $zero }}, rollback(tx, &ConstraintError{msg: fmt.Sprintf("one of \"{{ $e.Name }}\" %v already connected to a different \"{{ $.Name }}\"", keys({{ $receiver }}.{{ $e.BuilderField }}))})
}
}
if nodes := {{ $receiver }}.{{ $e.BuilderField }}; len(nodes) > 0 {
{{- with extend $ "Edge" $e "Nodes" true "Zero" $zero }}
{{ template "dialect/sql/defedge" . }}
{{- end }}
spec.Edges.Add = append(spec.Edges.Add, edge)
}
{{- end }}
if err = tx.Commit(); err != nil {
{{- if $one }}
{{ $ret }} = &{{ $.Name }}{config: {{ $receiver }}.config}
spec.ScanTypes = []interface{} {
&{{ if not $.ID.UserDefined }}sql.NullInt64{{ else }}{{ $.ID.NullType }}{{ end }}{},
{{- range $_, $f := $.Fields }}
&{{ $f.NullType }}{},
{{- end }}
}
spec.Assign = func(values ...interface{}) error {
if m, n := len(values), len(spec.ScanTypes); m != n {
return fmt.Errorf("mismatch number of scan values: %d != %d", m, n)
}
{{- if and $.ID.UserDefined (or $.ID.IsString $.ID.IsUUID) }}
{{- with extend $ "Idx" 0 "Field" $.ID "Ret" $ret }}
{{ template "dialect/sql/assignfield" . }}
{{- end }}
{{- else }}
value, ok := values[0].(*sql.NullInt64)
if !ok {
return fmt.Errorf("unexpected type %T for field id", value)
}
{{ $ret }}.ID = {{ if $.ID.IsString }}strconv.FormatInt(value.Int64, 10){{ else }}{{ $.ID.Type }}(value.Int64){{ end }}
{{- end }}
values = values[1:]
{{- range $i, $f := $.Fields }}
{{- with extend $ "Idx" $i "Field" $f "Ret" $ret }}
{{ template "dialect/sql/assignfield" . }}
{{- end }}
{{- end }}
return nil
}
{{- end }}
{{- if $one }}
if err = sqlgraph.UpdateNode(ctx, {{ $receiver }}.driver, spec); err != nil {
{{- else }}
if {{ $ret }}, err = sqlgraph.UpdateNodes(ctx, {{ $receiver }}.driver, spec); err != nil {
{{- end }}
if cerr, ok := isSQLConstraintError(err); ok {
err = cerr
}
return {{ $zero }}, err
}
return {{ if $one }}{{ $.Receiver }}{{ else }}len(ids){{ end }}, nil
return {{ $ret }}, nil
}
{{ end }}
{{ define "dialect/sql/update/convertid" }}
{{- $id := $.Type.ID }}
{{- if not $id.UserDefined }}
{{- if $id.IsString }}
eid, serr := strconv.Atoi(eid)
if serr != nil {
err = rollback(tx, serr)
return {{/* return is not knwon at this point. */}}
}
{{- else if not $id.IsInt}}
eid := int(eid)
{{- end }}
{{ define "dialect/sql/defedge" }}
{{- $e := $.Scope.Edge -}}
edge := &sqlgraph.EdgeSpec{
Rel: sqlgraph.{{ $e.Rel.Type }},
Inverse: {{ $e.IsInverse }},
Table: {{ $.Package }}.{{ $e.TableConstant }},
Columns: {{ if $e.M2M }}{{ $.Package }}.{{ $e.PKConstant }}{{ else }}[]string{ {{ $.Package }}.{{ $e.ColumnConstant }} }{{ end }},
Bidi: {{ $e.SelfRef }},
Target: &sqlgraph.EdgeTarget{
IDSpec: &sqlgraph.FieldSpec{
Type: field.{{ $e.Type.ID.Type.ConstName }},
Column: {{ $e.Type.Package }}.{{ $e.Type.ID.Constant }},
},
},
}
{{- with $.Scope.Nodes }}
for k, _ := range nodes {
{{- $id := $e.Type.ID -}}
{{- /* Convert string-ids that are stored as int in the database */ -}}
{{- if and (not $id.UserDefined) $id.IsString }}
k, err := strconv.Atoi(k)
if err != nil {
return {{ $.Scope.Zero }}, err
}
{{- end }}
edge.Target.Nodes = append(edge.Target.Nodes, k)
}
{{- end }}
{{ end }}
{{- end }}
{{ define "dialect/sql/assignfield" }}
{{- $i := $.Scope.Idx -}}
{{- $f := $.Scope.Field -}}
{{- $ret := $.Scope.Ret -}}
{{- if $f.IsJSON }}
if value, ok := values[{{ $i }}].(*{{ $f.NullType }}); !ok {
return fmt.Errorf("unexpected type %T for field {{ $f.Name }}", values[{{ $i }}])
} else if value != nil && len(*value) > 0 {
if err := json.Unmarshal(*value, &{{ $ret }}.{{ $f.StructField }}); err != nil {
return fmt.Errorf("unmarshal field {{ $f.Name }}: %v", err)
}
}
{{- else }}
{{- $nulltype := $f.NullType -}}
if value, ok := values[{{ $i }}].(*{{ $nulltype }}); !ok {
return fmt.Errorf("unexpected type %T for field {{ $f.Name }}", values[{{ $i }}])
{{- if hasPrefix $nulltype "sql" }}
} else if value.Valid {
{{- if $f.Nillable }}
{{ $ret }}.{{ $f.StructField }} = new({{ $f.Type }})
*{{ $ret }}.{{ $f.StructField }} = {{ $f.NullTypeField "value" }}
{{- else }}
{{ $ret }}.{{ $f.StructField }} = {{ $f.NullTypeField "value" }}
{{- end }}
{{- else }}
} else if value != nil {
{{ $ret }}.{{ $f.StructField }} = *value
{{- end }}
}
{{- end }}
{{- end }}