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133 changes: 133 additions & 0 deletions
133
Shared/Samples/List geodatabase versions/ListGeodatabaseVersionsView.swift
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// Copyright 2025 Esri | ||
// | ||
// Licensed under the Apache License, Version 2.0 (the "License"); | ||
// you may not use this file except in compliance with the License. | ||
// You may obtain a copy of the License at | ||
// | ||
// https://www.apache.org/licenses/LICENSE-2.0 | ||
// | ||
// Unless required by applicable law or agreed to in writing, software | ||
// distributed under the License is distributed on an "AS IS" BASIS, | ||
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
// See the License for the specific language governing permissions and | ||
// limitations under the License. | ||
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import ArcGIS | ||
import SwiftUI | ||
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struct ListGeodatabaseVersionsView: View { | ||
/// The analysis error shown in the error alert. | ||
@State private var analysisError: Error? | ||
/// The task used to perform geoprocessing jobs. | ||
@State private var geoprocessingTask = GeoprocessingTask( | ||
url: URL(string: "https://sampleserver6.arcgisonline.com/arcgis/rest/services/GDBVersions/GPServer/ListVersions")! | ||
) | ||
/// The geodatabase version information. | ||
@State private var geodatabaseVersionInfos: [GeodatabaseVersionInfo]? | ||
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var body: some View { | ||
Form { | ||
if let geodatabaseVersionInfos { | ||
ForEach(geodatabaseVersionInfos, id: \.objectID) { version in | ||
Section("OBJECTID: \(version.objectID)") { | ||
LabeledContent("Name", value: version.name) | ||
.lineLimit(1) | ||
.textSelection(.enabled) | ||
LabeledContent("Access", value: version.access) | ||
LabeledContent("Created", value: version.created.formatted(date: .abbreviated, time: .shortened)) | ||
LabeledContent("Last Modified", value: version.lastModified.formatted(date: .abbreviated, time: .shortened)) | ||
LabeledContent("Is Owner", value: version.isOwner) | ||
LabeledContent("Parent Version", value: version.parentVersionName) | ||
if !version.description.isEmpty { | ||
LabeledContent("Description", value: version.description) | ||
} | ||
} | ||
} | ||
} else { | ||
ProgressView() | ||
.frame(maxWidth: .infinity) | ||
} | ||
} | ||
.task { | ||
do { | ||
if let resultFeatures = try await fetchGeodatabaseVersions() { | ||
geodatabaseVersionInfos = makeGeodatabaseVersionInfos(from: resultFeatures) | ||
} | ||
} catch { | ||
analysisError = error | ||
} | ||
} | ||
.errorAlert(presentingError: $analysisError) | ||
} | ||
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/// Fetches geodatabase versions using a geoprocessing job. | ||
private func fetchGeodatabaseVersions() async throws -> FeatureSet? { | ||
// Creates and configures the job's parameters. | ||
let parameters = try await geoprocessingTask.makeDefaultParameters() | ||
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// Creates and starts the job. | ||
let geoprocessingJob = geoprocessingTask.makeJob(parameters: parameters) | ||
geoprocessingJob.start() | ||
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// Waits for the job to finish and retrieves the output. | ||
let result = try await withTaskCancellationHandler { | ||
try await geoprocessingJob.output | ||
} onCancel: { | ||
Task.detached { | ||
await geoprocessingJob.cancel() | ||
} | ||
} | ||
guard let versions = result.outputs["Versions"] as? GeoprocessingFeatures else { | ||
return nil | ||
} | ||
return versions.features | ||
} | ||
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/// Converts the features to an array of `GeodatabaseVersionInfo`. | ||
/// - Parameter featureSet: The features with version info from the job. | ||
/// - Returns: An array of `GeodatabaseVersionInfo`. | ||
private func makeGeodatabaseVersionInfos(from featureSet: FeatureSet) -> [GeodatabaseVersionInfo] { | ||
featureSet | ||
.features() | ||
.compactMap { version in | ||
GeodatabaseVersionInfo(from: version.attributes) | ||
} | ||
.sorted { | ||
$0.objectID < $1.objectID | ||
} | ||
} | ||
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/// A structure representing geodatabase version information. | ||
private struct GeodatabaseVersionInfo { | ||
let objectID: Int64 | ||
let name: String | ||
let access: String | ||
let created: Date | ||
let lastModified: Date | ||
let isOwner: String | ||
let parentVersionName: String | ||
let description: String | ||
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init?(from dictionary: [String: Sendable]) { | ||
guard let access = dictionary["access"] as? String, | ||
let created = dictionary["created"] as? Date, | ||
let description = dictionary["description"] as? String, | ||
let isOwner = dictionary["isowner"] as? String, | ||
let lastModified = dictionary["lastmodified"] as? Date, | ||
let name = dictionary["name"] as? String, | ||
let objectID = dictionary["ObjectID"] as? Int64, | ||
let parentVersionName = dictionary["parentversionname"] as? String else { | ||
return nil | ||
} | ||
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self.objectID = objectID | ||
self.name = name | ||
self.access = access | ||
self.created = created | ||
self.lastModified = lastModified | ||
self.isOwner = isOwner | ||
self.parentVersionName = parentVersionName | ||
self.description = description | ||
} | ||
} | ||
} |
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# List geodatabase versions | ||
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Connect to a service and list versions of the geodatabase. | ||
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 | ||
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## Use case | ||
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As part of a multi-user editing scenario, you can check with the server to see how many versions of the geodatabase are outstanding before syncing. | ||
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## How to use the sample | ||
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When the sample loads, a list of geodatabase versions and their properties will be displayed. | ||
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## How it works | ||
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1. Create a geoprocessing task referring to a **GPServer** with a **ListVersions** task. | ||
2. Use the task to create default parameters. | ||
3. Use the created parameters to create a job. | ||
4. Run the job to get a geoprocessing result. | ||
5. Get a list of geoprocessing features from the **Versions** output parameter of the results. | ||
6. Format the geodatabase versions for display. | ||
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## Relevant API | ||
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* GeoprocessingFeatures | ||
* GeoprocessingJob | ||
* GeoprocessingParameters | ||
* GeoprocessingResult | ||
* GeoprocessingTask | ||
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## About the data | ||
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The sample uses a [sample geoprocessing service](https://sampleserver6.arcgisonline.com/arcgis/rest/services/GDBVersions/GPServer/ListVersions) hosted on ArcGIS Online. | ||
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## Additional information | ||
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ArcGIS Server does not include a geoprocessing service for listing geodatabase versions. You must configure one using the steps defined in [Geoprocessing service example: list, create, and delete geodatabase versions](https://desktop.arcgis.com/en/arcmap/latest/analyze/sharing-workflows/gp-service-example-list-create-and-delete-geodatabase-versions.htm) in the *ArcMap* documentation. | ||
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## Tags | ||
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conflict resolution, data management, database, multi-user, sync, version |
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33
Shared/Samples/List geodatabase versions/README.metadata.json
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{ | ||
"category": "Analysis", | ||
yo1995 marked this conversation as resolved.
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"description": "Connect to a service and list versions of the geodatabase.", | ||
"ignore": false, | ||
"images": [ | ||
"list-geodatabase-versions.png" | ||
], | ||
"keywords": [ | ||
"conflict resolution", | ||
"data management", | ||
"database", | ||
"multi-user", | ||
"sync", | ||
"version", | ||
"GeoprocessingFeatures", | ||
"GeoprocessingJob", | ||
"GeoprocessingParameters", | ||
"GeoprocessingResult", | ||
"GeoprocessingTask" | ||
], | ||
"redirect_from": [], | ||
"relevant_apis": [ | ||
"GeoprocessingFeatures", | ||
"GeoprocessingJob", | ||
"GeoprocessingParameters", | ||
"GeoprocessingResult", | ||
"GeoprocessingTask" | ||
], | ||
"snippets": [ | ||
"ListGeodatabaseVersionsView.swift" | ||
], | ||
"title": "List geodatabase versions" | ||
} |
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Shared/Samples/List geodatabase versions/list-geodatabase-versions.png
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