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columns.go
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/
columns.go
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package sqlite
import (
"context"
"database/sql"
"sort"
"github.com/pkg/errors"
"admini.dev/admini/app/lib/database"
"admini.dev/admini/app/lib/schema/field"
"admini.dev/admini/app/lib/schema/model"
"admini.dev/admini/app/util"
"admini.dev/admini/queries/qsqlite"
)
type columnResult struct {
Table string `db:"xn"`
Ordinal int32 `db:"i"`
Name string `db:"n"`
DataType string `db:"t"`
PK int `db:"pk"`
Default sql.NullString `db:"dv"`
NotNull int `db:"nn"`
}
func (cr *columnResult) IsNullable() bool {
return cr.NotNull == 0
}
func (cr *columnResult) AsField(readOnlyOverride bool, logger util.Logger) *field.Field {
var d any
if cr.Default.Valid {
d = cr.Default.String
}
return &field.Field{
Key: cr.Name,
Type: typeFor(cr.DataType, cr, logger),
Default: d,
ReadOnly: readOnlyOverride,
Metadata: nil,
}
}
func loadColumns(ctx context.Context, models model.Models, db *database.Service, logger util.Logger) error {
var cols []*columnResult
err := db.Select(ctx, &cols, qsqlite.ListColumns(db.SchemaName), nil, logger)
if err != nil {
return errors.Wrap(err, "can't list columns")
}
pks := map[*model.Model]map[int]string{}
for _, col := range cols {
mod := models.Get(nil, col.Table)
if mod == nil {
return errors.Errorf("no table [%s] found among [%d] candidates", col.Table, len(models))
}
err = mod.AddField(col.AsField(mod.Type == model.TypeInterface, logger))
if err != nil {
return errors.Wrap(err, "can't add field")
}
if col.PK > 0 {
curr, ok := pks[mod]
if !ok {
curr = map[int]string{}
pks[mod] = curr
}
curr[col.PK] = col.Name
}
}
for k, v := range pks {
idx := &model.Index{Key: k.Key + "_pk", Unique: true, Primary: true}
nums := make([]int, 0, len(v))
for num := range v {
nums = append(nums, num)
}
sort.Ints(nums)
for _, num := range nums {
idx.Fields = append(idx.Fields, v[num])
}
k.Indexes = append(k.Indexes, idx)
}
return nil
}