Mercurial > gemma
view pkg/models/sr.go @ 4969:5621586e7a54 fairway-marks-import
Avoid checking the same condition twice
An entry should either be UPDATEd or INSERTed, if it's not already
in the database. Thus simply INSERT if there was no UPDATE.
author | Tom Gottfried <tom@intevation.de> |
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date | Fri, 28 Feb 2020 17:55:55 +0100 |
parents | 98e2041c7ebf |
children | 85f19e924a43 |
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// This is Free Software under GNU Affero General Public License v >= 3.0 // without warranty, see README.md and license for details. // // SPDX-License-Identifier: AGPL-3.0-or-later // License-Filename: LICENSES/AGPL-3.0.txt // // Copyright (C) 2018 by via donau // – Österreichische Wasserstraßen-Gesellschaft mbH // Software engineering by Intevation GmbH // // Author(s): // * Sascha L. Teichmann <sascha.teichmann@intevation.de> // * Bernhard E. Reiter <bernhard.reiter@intevation.de> package models import ( "context" "database/sql" "encoding/json" "errors" "fmt" "io" "gemma.intevation.de/gemma/pkg/common" ) type ( SoundingResultMeta struct { Date Date `json:"date"` Bottleneck string `json:"bottleneck"` EPSG uint `json:"epsg"` DepthReference string `json:"depth-reference"` SingleBeam bool `json:"single-beam"` NegateZ bool `json:"negate-z,omitempty"` } ) const ( checkDepthReferenceSQL = ` SELECT EXISTS(SELECT 1 FROM waterway.bottlenecks bn JOIN waterway.gauges g ON bn.gauge_location = g.location AND $3::timestamptz <@ g.validity JOIN waterway.gauges_reference_water_levels rl ON g.location = rl.location AND g.validity = rl.validity WHERE bn.objnam = $1 AND rl.depth_reference = $2)` checkBottleneckSQL = ` SELECT true FROM waterway.bottlenecks WHERE objnam = $1` checkBottleneckDateUniqueSQL = ` SELECT true FROM waterway.sounding_results sr JOIN waterway.bottlenecks bn ON sr.bottleneck_id = bn.bottleneck_id WHERE bn.objnam = $1 AND sr.date_info = $2` ) func (m *SoundingResultMeta) Decode(r io.Reader) error { err := json.NewDecoder(r).Decode(m) if err == nil && m.EPSG == 0 { m.EPSG = WGS84 } return err } func (m *SoundingResultMeta) Validate(ctx context.Context, conn *sql.Conn) []error { var errs []error var b bool err := conn.QueryRowContext(ctx, checkBottleneckSQL, m.Bottleneck).Scan(&b) switch { case err == sql.ErrNoRows: errs = append(errs, fmt.Errorf("unknown bottleneck '%s'", m.Bottleneck)) case err != nil: errs = append(errs, err) case !b: errs = append(errs, errors.New("unexpected bottleneck")) } if m.DepthReference != "ZPG" { err = conn.QueryRowContext(ctx, checkDepthReferenceSQL, m.Bottleneck, m.DepthReference, m.Date.Time).Scan(&b) switch { case !b: errs = append(errs, fmt.Errorf("unknown depth reference '%s'", m.DepthReference)) case err != nil: errs = append(errs, err) } } err = conn.QueryRowContext(ctx, checkBottleneckDateUniqueSQL, m.Bottleneck, m.Date.Time).Scan(&b) switch { case err == sql.ErrNoRows: // good! -> unique. case err != nil: errs = append(errs, err) case b: errs = append(errs, fmt.Errorf("sounding result for date %s already exists at bottleneck '%s'", m.Date.Time.Format(common.DateFormat), m.Bottleneck)) } return errs }