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provide common method QueryOne for single row queries

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This commit is contained in:
Helmut Merz 2024-04-12 13:00:13 +02:00
parent a9f8ea6b47
commit 53e0759e9f
1 changed files with 13 additions and 16 deletions
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29
storage/tracking/tracking.go
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@ -99,7 +99,9 @@ func (cont *Container) setupQuerySpec(spec *querySpec) *querySpec {
} else {
spec.Table = fmt.Sprintf("%s.%s", cont.Storage.Schema, cont.TableName)
}
spec.Scols = append(cont.HeadFields, "timestamp", "data", "trackid")
if spec.Scols == nil {
spec.Scols = append(cont.HeadFields, "timestamp", "data", "trackid")
}
for i, v := range spec.Headvals {
if v != "" {
spec.Qucols = append(spec.Qucols, cont.HeadFields[i])
@ -124,36 +126,31 @@ type querySpec struct {
}
func (cont *Container) Get(id lib.Ident) *Track {
db := cont.Storage
var tr *Track
proc := func(r *sql.Rows) error {
tr = cont.ItemFactory(cont)
return tr.ScanP(r)
}
quSpec := &querySpec{
Qucols: lib.StrSlice{"trackid"},
Quvals: []any{id},
}
cont.setupQuerySpec(quSpec)
sql := storage.BuildSql(SqlSelect, quSpec)
db.Query(proc, sql, id)
return tr
return cont.QueryOne(quSpec)
}
func (cont *Container) QueryLast(hv ...string) *Track {
quSpec := &querySpec{
Headvals: hv,
Ordcols: lib.StrSlice{"timestamp"},
Limit: 1,
}
return cont.QueryOne(quSpec)
}
func (cont *Container) QueryOne(quSpec *querySpec) *Track {
db := cont.Storage
var tr *Track
proc := func(r *sql.Rows) error {
tr = cont.ItemFactory(cont)
return tr.ScanP(r)
}
quSpec := &querySpec{
Headvals: hv,
Ordcols: lib.StrSlice{"timestamp"},
}
cont.setupQuerySpec(quSpec)
sql := storage.BuildSql(SqlSelect, quSpec)
println(sql)
db.Query(proc, sql, quSpec.Quvals...)
return tr
}