sqlboiler/templates/09_relationship_to_many_eager.tpl

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{{- if .Table.IsJoinTable -}}
{{- else -}}
{{- $dot := . -}}
{{- range .Table.ToManyRelationships -}}
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{{- $varNameSingular := $dot.Table.Name | singular | camelCase -}}
{{- $txt := txtsFromToMany $dot.Tables $dot.Table . -}}
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{{- $arg := printf "maybe%s" $txt.LocalTable.NameGo -}}
{{- $slice := printf "%sSlice" $txt.LocalTable.NameGo -}}
{{- $schemaForeignTable := .ForeignTable | $dot.SchemaTable}}
// Load{{$txt.Function.Name}} allows an eager lookup of values, cached into the
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// loaded structs of the objects.
func ({{$varNameSingular}}L) Load{{$txt.Function.Name}}(e boil.Executor, singular bool, {{$arg}} interface{}) error {
var slice []*{{$txt.LocalTable.NameGo}}
var object *{{$txt.LocalTable.NameGo}}
count := 1
if singular {
object = {{$arg}}.(*{{$txt.LocalTable.NameGo}})
} else {
slice = *{{$arg}}.(*{{$slice}})
count = len(slice)
}
args := make([]interface{}, count)
if singular {
if object.R == nil {
object.R = &{{$varNameSingular}}R{}
}
args[0] = object.{{.Column | titleCase}}
} else {
for i, obj := range slice {
if obj.R == nil {
obj.R = &{{$varNameSingular}}R{}
}
args[i] = obj.{{.Column | titleCase}}
}
}
{{if .ToJoinTable -}}
{{- $schemaJoinTable := .JoinTable | $dot.SchemaTable -}}
query := fmt.Sprintf(
"select {{id 0 | $dot.Quotes}}.*, {{id 1 | $dot.Quotes}}.{{.JoinLocalColumn | $dot.Quotes}} from {{$schemaForeignTable}} as {{id 0 | $dot.Quotes}} inner join {{$schemaJoinTable}} as {{id 1 | $dot.Quotes}} on {{id 0 | $dot.Quotes}}.{{.ForeignColumn | $dot.Quotes}} = {{id 1 | $dot.Quotes}}.{{.JoinForeignColumn | $dot.Quotes}} where {{id 1 | $dot.Quotes}}.{{.JoinLocalColumn | $dot.Quotes}} in (%s)",
strmangle.Placeholders(dialect.IndexPlaceholders, count, 1, 1),
)
{{else -}}
query := fmt.Sprintf(
"select * from {{$schemaForeignTable}} where {{.ForeignColumn | $dot.Quotes}} in (%s)",
strmangle.Placeholders(dialect.IndexPlaceholders, count, 1, 1),
)
{{end -}}
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if boil.DebugMode {
fmt.Fprintf(boil.DebugWriter, "%s\n%v\n", query, args)
}
results, err := e.Query(query, args...)
if err != nil {
return errors.Wrap(err, "failed to eager load {{.ForeignTable}}")
}
defer results.Close()
var resultSlice []*{{$txt.ForeignTable.NameGo}}
{{if .ToJoinTable -}}
{{- $foreignTable := getTable $dot.Tables .ForeignTable -}}
{{- $joinTable := getTable $dot.Tables .JoinTable -}}
{{- $localCol := $joinTable.GetColumn .JoinLocalColumn}}
var localJoinCols []{{$localCol.Type}}
for results.Next() {
one := new({{$txt.ForeignTable.NameGo}})
var localJoinCol {{$localCol.Type}}
err = results.Scan({{$foreignTable.Columns | columnNames | stringMap $dot.StringFuncs.titleCase | prefixStringSlice "&one." | join ", "}}, &localJoinCol)
if err = results.Err(); err != nil {
return errors.Wrap(err, "failed to plebian-bind eager loaded slice {{.ForeignTable}}")
}
resultSlice = append(resultSlice, one)
localJoinCols = append(localJoinCols, localJoinCol)
}
if err = results.Err(); err != nil {
return errors.Wrap(err, "failed to plebian-bind eager loaded slice {{.ForeignTable}}")
}
{{else -}}
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if err = queries.Bind(results, &resultSlice); err != nil {
return errors.Wrap(err, "failed to bind eager loaded slice {{.ForeignTable}}")
}
{{end}}
{{if not $dot.NoHooks -}}
if len({{.ForeignTable | singular | camelCase}}AfterSelectHooks) != 0 {
for _, obj := range resultSlice {
if err := obj.doAfterSelectHooks(e); err != nil {
return err
}
}
}
{{- end}}
if singular {
object.R.{{$txt.Function.Name}} = resultSlice
return nil
}
{{if .ToJoinTable -}}
for i, foreign := range resultSlice {
localJoinCol := localJoinCols[i]
for _, local := range slice {
{{if $txt.Function.UsesBytes -}}
if 0 == bytes.Compare(local.{{$txt.Function.LocalAssignment}}, localJoinCol) {
{{else -}}
if local.{{$txt.Function.LocalAssignment}} == localJoinCol {
{{end -}}
local.R.{{$txt.Function.Name}} = append(local.R.{{$txt.Function.Name}}, foreign)
break
}
}
}
{{else -}}
for _, foreign := range resultSlice {
for _, local := range slice {
{{if $txt.Function.UsesBytes -}}
if 0 == bytes.Compare(local.{{$txt.Function.LocalAssignment}}, foreign.{{$txt.Function.ForeignAssignment}}) {
{{else -}}
if local.{{$txt.Function.LocalAssignment}} == foreign.{{$txt.Function.ForeignAssignment}} {
{{end -}}
local.R.{{$txt.Function.Name}} = append(local.R.{{$txt.Function.Name}}, foreign)
break
}
}
}
{{end}}
return nil
}
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{{end -}}{{/* range tomany */}}
{{- end -}}{{/* if IsJoinTable */}}