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annotate pkg/controllers/surveys.go @ 3302:ec6163c6687d

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'Historicise' gauges on import Gauge data sets will be updated or a new version will be inserted depending on temporal validity and a timestamp marking the last update in the RIS-Index of a data set. The trigger on date_info is removed because the value is actually an attribut coming from the RIS-Index. Gauge measurements and predictions are associated to the version with matching temporal validity. Bottlenecks are always associated to the actual version of the gauge, although this might change as soon as bottlenecks are 'historicised', too.
author Tom Gottfried <tom@intevation.de>
date Thu, 16 May 2019 18:41:43 +0200
parents 8a8680e70d2e
children 02951a62e8c6
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1 // This is Free Software under GNU Affero General Public License v >= 3.0
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2 // without warranty, see README.md and license for details.
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3 //
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4 // SPDX-License-Identifier: AGPL-3.0-or-later
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5 // License-Filename: LICENSES/AGPL-3.0.txt
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6 //
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7 // Copyright (C) 2018, 2019 by via donau
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8 // – Österreichische Wasserstraßen-Gesellschaft mbH
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9 // Software engineering by Intevation GmbH
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10 //
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11 // Author(s):
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12 // * Sascha Wilde <sascha.wilde@intevation.de>
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13 // * Sascha L. Teichmann <sascha.teichmann@intevation.de>
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14 // * Bernhard Reiter <bernhard.reiter@intevation.de>
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15
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16 package controllers
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17
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18 import (
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19 "database/sql"
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20 "net/http"
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21
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22 "gemma.intevation.de/gemma/pkg/models"
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23 "github.com/gorilla/mux"
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24 )
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25
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26 const (
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27 listSurveysSQL = `
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28 SELECT
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29 s.bottleneck_id,
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30 s.date_info::text,
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31 s.depth_reference,
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32 g.objname AS gauge_objname,
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33 r.value AS waterlevel_value
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34 FROM waterway.bottlenecks AS b
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35 JOIN waterway.gauges AS g
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36 ON b.gauge_location = g.location AND b.gauge_validity = g.validity
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37 JOIN waterway.sounding_results AS s ON b.id = s.bottleneck_id
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38 LEFT JOIN waterway.gauges_reference_water_levels AS r
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39 USING (depth_reference, location, validity)
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40 WHERE b.objnam = $1`
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41 )
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42
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43 func listSurveys(
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44 _ interface{},
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45 req *http.Request,
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46 db *sql.Conn,
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47 ) (jr JSONResult, err error) {
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48
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49 bottleneckName := mux.Vars(req)["bottleneck"]
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50
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51 var rows *sql.Rows
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52
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53 rows, err = db.QueryContext(req.Context(), listSurveysSQL, bottleneckName)
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54 if err != nil {
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55 return
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56 }
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57 defer rows.Close()
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58
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59 surveys := []*models.Survey{}
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60
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61 // as we do not use the values here, we could simply the code here
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62 // to work without an explicit mdels/surverys.go
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63 // (like done in controllers/search.go)
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64 for rows.Next() {
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65 var survey models.Survey
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66 var level sql.NullInt64
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67 if err = rows.Scan(
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68 &survey.BottleneckID,
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69 &survey.DateInfo,
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70 &survey.DepthReference,
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71 &survey.ReferenceGauge,
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72 &level,
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73 ); err != nil {
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74 return
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75 }
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76 if level.Valid {
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77 survey.WaterLevelValue = &level.Int64
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78 }
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79 surveys = append(surveys, &survey)
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80 }
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81
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82 if err = rows.Err(); err != nil {
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83 return
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84 }
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85
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86 jr = JSONResult{
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87 Result: struct {
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88 Surveys []*models.Survey `json:"surveys"`
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89 }{surveys},
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90 }
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91 return
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92 }