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columns.go
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columns.go
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package postgres
import (
"context"
"database/sql"
"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/qpostgres"
)
type columnResult struct {
Schema string `db:"table_schema"`
Table string `db:"table_name"`
Name string `db:"column_name"`
Ordinal int32 `db:"ordinal_position"`
Default sql.NullString `db:"column_default"`
Nullable string `db:"is_nullable"`
DataType string `db:"data_type"`
ArrayType sql.NullString `db:"array_type"`
CharLength sql.NullInt32 `db:"character_maximum_length"`
OctetLength sql.NullInt32 `db:"character_octet_length"`
NumericPrecision sql.NullInt32 `db:"numeric_precision"`
NumericPrecisionRadix sql.NullInt32 `db:"numeric_precision_radix"`
NumericScale sql.NullInt32 `db:"numeric_scale"`
DatetimePrecision sql.NullInt32 `db:"datetime_precision"`
IntervalType sql.NullInt32 `db:"interval_type"`
DomainSchema sql.NullString `db:"domain_schema"`
DomainName sql.NullString `db:"domain_name"`
UDTSchema string `db:"udt_schema"`
UDTName string `db:"udt_name"`
DTDIdentifier string `db:"dtd_identifier"`
Updatable string `db:"is_updatable"`
}
func (cr *columnResult) IsNullable() bool {
return cr.Nullable == pgYes
}
func (cr *columnResult) AsField(readOnlyOverride bool, enums model.Models, 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.UDTName, cr, enums, logger),
Default: d,
ReadOnly: readOnlyOverride || (cr.Updatable == pgNo),
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, qpostgres.ListColumns(db.SchemaName), nil, logger)
if err != nil {
return errors.Wrap(err, "can't list columns")
}
for _, col := range cols {
mod := models.Get(util.Pkg{col.Schema}, 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, models, logger))
if err != nil {
return errors.Wrap(err, "can't add field")
}
}
return nil
}