src/MyWebLog.Data/Postgres/PostgresPageData.fs

@@ -53,15 +53,18 @@ type PostgresPageData(log: ILogger) =
         log.LogTrace "Page.countListed"
         Count.byContains Table.Page {| webLogDoc webLogId with IsInPageList = true |}
     
-    /// Find a page by its ID (without revisions)
+    /// Find a page by its ID (without revisions or prior permalinks)
-    let findById pageId webLogId =
+    let findById pageId webLogId = backgroundTask {
         log.LogTrace "Page.findById"
-        Document.findByIdAndWebLog<PageId, Page> Table.Page pageId webLogId
+        match! Document.findByIdAndWebLog<PageId, Page> Table.Page pageId webLogId with
+        | Some page -> return Some { page with PriorPermalinks = [] }
+        | None -> return None
+    }
     
     /// Find a complete page by its ID
     let findFullById pageId webLogId = backgroundTask {
         log.LogTrace "Page.findFullById"
-        match! findById pageId webLogId with
+        match! Document.findByIdAndWebLog<PageId, Page> Table.Page pageId webLogId with
         | Some page ->
             let! withMore = appendPageRevisions page
             return Some withMore

src/MyWebLog.Data/RethinkDbData.fs

@@ -444,20 +444,27 @@ type RethinkDbData(conn: Net.IConnection, config: DataConfig, log: ILogger<Rethi
                     return result.Deleted > 0UL
                 }
                 
-                member _.FindById pageId webLogId =
+                member _.FindById pageId webLogId = backgroundTask {
-                    rethink<Page> {
+                    let! page =
+                        rethink<Page list> {
                             withTable Table.Page
-                        get pageId
+                            getAll [ pageId ]
                             without [ nameof Page.Empty.PriorPermalinks; nameof Page.Empty.Revisions ]
-                        resultOption; withRetryOptionDefault
+                            result; withRetryDefault
+                        }
+                        |> tryFirst <| conn
+                    return
+                        page
+                        |> Option.filter (fun pg -> pg.WebLogId = webLogId)
+                        |> Option.map (fun pg -> { pg with Revisions = []; PriorPermalinks = [] })
                 }
-                    |> verifyWebLog webLogId (fun it -> it.WebLogId) <| conn
 
                 member _.FindByPermalink permalink webLogId =
                     rethink<Page list> {
                         withTable Table.Page
                         getAll [ [| webLogId :> obj; permalink |] ] (nameof Page.Empty.Permalink)
-                        without [ nameof Page.Empty.PriorPermalinks; nameof Page.Empty.Revisions ]
+                        merge (r.HashMap(nameof Page.Empty.PriorPermalinks, [||])
+                                   .With(nameof Page.Empty.Revisions, [||]))
                         limit 1
                         result; withRetryDefault
                     }
@@ -474,7 +481,7 @@ type RethinkDbData(conn: Net.IConnection, config: DataConfig, log: ILogger<Rethi
                             result; withRetryDefault
                         }
                         |> tryFirst) conn
-                    return result |> Option.map (fun pg -> pg.Permalink)
+                    return result |> Option.map _.Permalink
                 }
                 
                 member _.FindFullById pageId webLogId =
@@ -483,7 +490,7 @@ type RethinkDbData(conn: Net.IConnection, config: DataConfig, log: ILogger<Rethi
                         get pageId
                         resultOption; withRetryOptionDefault
                     }
-                    |> verifyWebLog webLogId (fun it -> it.WebLogId) <| conn
+                    |> verifyWebLog webLogId _.WebLogId <| conn
                 
                 member _.FindFullByWebLog webLogId = rethink<Page> {
                     withTable Table.Page

src/MyWebLog.Data/SQLite/SQLitePageData.fs

@@ -57,15 +57,18 @@ type SQLitePageData(conn: SqliteConnection, log: ILogger) =
             [ webLogParam webLogId ]
             (toCount >> int)
     
-    /// Find a page by its ID (without revisions)
+    /// Find a page by its ID (without revisions and prior permalinks)
-    let findById pageId webLogId =
+    let findById pageId webLogId = backgroundTask {
         log.LogTrace "Page.findById"
-        Document.findByIdAndWebLog<PageId, Page> Table.Page pageId webLogId conn
+        match! Document.findByIdAndWebLog<PageId, Page> Table.Page pageId webLogId conn with
+        | Some page -> return Some { page with PriorPermalinks = [] }
+        | None -> return None
+    }
     
     /// Find a complete page by its ID
     let findFullById pageId webLogId = backgroundTask {
         log.LogTrace "Page.findFullById"
-        match! findById pageId webLogId with
+        match! Document.findByIdAndWebLog<PageId, Page> Table.Page pageId webLogId conn with
         | Some page ->
             let! page = appendPageRevisions page
             return Some page

src/MyWebLog.Tests/Data/PageDataTests.fs

@@ -1,5 +1,6 @@
 module PageDataTests
 
+open System
 open Expecto
 open MyWebLog
 open MyWebLog.Data
@@ -8,6 +9,12 @@ open NodaTime
 /// The ID of the root web log
 let rootId = WebLogId "uSitJEuD3UyzWC9jgOHc8g"
 
+/// The ID of the "A cool page" page
+let coolPageId = PageId "hgc_BLEZ50SoAWLuPNISvA"
+
+/// The published and updated time of the "A cool page" page
+let coolPagePublished = Instant.FromDateTimeOffset(DateTimeOffset.Parse "2024-01-20T22:14:28Z")
+
 let ``Add succeeds`` (data: IData) = task {
     let page =
         { Id              = PageId "added-page"
@@ -55,6 +62,8 @@ let ``All succeeds`` (data: IData) = task {
         Expect.isEmpty pg.Metadata $"Page {idx} should have had no metadata"
         Expect.isEmpty pg.Revisions $"Page {idx} should have had no revisions"
         Expect.isEmpty pg.PriorPermalinks $"Page {idx} should have had no prior permalinks")
+    let! others = data.Page.All (WebLogId "not-there")
+    Expect.isEmpty others "There should not be pages retrieved"
 }
 
 let ``CountAll succeeds`` (data: IData) = task {
@@ -66,3 +75,54 @@ let ``CountListed succeeds`` (data: IData) = task {
     let! pages = data.Page.CountListed rootId
     Expect.equal pages 1 "There should have been 1 page in the page list"
 }
+
+let ``FindById succeeds when a page is found`` (data: IData) = task {
+    let! page = data.Page.FindById coolPageId rootId
+    Expect.isSome page "A page should have been returned"
+    let pg = page.Value
+    Expect.equal pg.Id coolPageId "The wrong page was retrieved"
+    Expect.equal pg.WebLogId rootId "The page's web log did not match the called parameter"
+    Expect.equal pg.AuthorId (WebLogUserId "5EM2rimH9kONpmd2zQkiVA") "Author ID is incorrect"
+    Expect.equal pg.Title "Page Title" "Title is incorrect"
+    Expect.equal pg.Permalink (Permalink "a-cool-page.html") "Permalink is incorrect"
+    Expect.equal
+        pg.PublishedOn (Instant.FromDateTimeOffset(DateTimeOffset.Parse "2024-01-20T22:14:28Z")) "Published On is incorrect"
+    Expect.equal pg.UpdatedOn (Instant.FromDateTimeOffset(DateTimeOffset.Parse "2024-01-20T22:14:28Z")) "Updated On is incorrect"
+    Expect.isFalse pg.IsInPageList "Is in page list flag should not have been set"
+    Expect.equal pg.Text "<h1 id=\"a-cool-page\">A Cool Page</h1>\n<p>It really is cool!</p>\n" "Text is incorrect"
+    Expect.hasLength pg.Metadata 2 "There should be 2 metadata items on this page"
+    Expect.equal pg.Metadata[0].Name "Cool" "Meta item 0 name is incorrect"
+    Expect.equal pg.Metadata[0].Value "true" "Meta item 0 value is incorrect"
+    Expect.equal pg.Metadata[1].Name "Warm" "Meta item 1 name is incorrect"
+    Expect.equal pg.Metadata[1].Value "false" "Meta item 1 value is incorrect"
+    Expect.isEmpty pg.Revisions "Revisions should not have been retrieved"
+    Expect.isEmpty pg.PriorPermalinks "Prior permalinks should not have been retrieved"
+}
+
+let ``FindById succeeds when a page is not found (incorrect weblog)`` (data: IData) = task {
+    let! page = data.Page.FindById coolPageId (WebLogId "wrong")
+    Expect.isNone page "The page should not have been retrieved"
+}
+
+let ``FindById succeeds when a page is not found (bad page ID)`` (data: IData) = task {
+    let! page = data.Page.FindById (PageId "missing") rootId
+    Expect.isNone page "The page should not have been retrieved"
+}
+
+let ``FindFullById succeeds when a page is found`` (data: IData) = task {
+    let! page = data.Page.FindFullById coolPageId rootId
+    Expect.isSome page "A page should have been returned"
+    let pg = page.Value
+    Expect.equal pg.Id coolPageId "The wrong page was retrieved"
+    Expect.equal pg.WebLogId rootId "The page's web log did not match the called parameter"
+    Expect.hasLength pg.Revisions 1 "There should be 1 revision"
+    Expect.equal pg.Revisions[0].AsOf coolPagePublished "Revision 0 as-of is incorrect"
+    Expect.equal pg.Revisions[0].Text (Markdown "# A Cool Page\n\nIt really is cool!") "Revision 0 text is incorrect"
+    Expect.hasLength pg.PriorPermalinks 1 "There should be 1 prior permalink"
+    Expect.equal pg.PriorPermalinks[0] (Permalink "a-cool-pg.html") "Prior permalink 0 is incorrect"
+}
+
+let ``FindFullById succeeds when a page is not found`` (data: IData) = task {
+    let! page = data.Page.FindFullById (PageId "not-there") rootId
+    Expect.isNone page "A page should not have been retrieved"
+}

src/MyWebLog.Tests/Data/PostgresDataTests.fs

@@ -131,6 +131,25 @@ let pageTests = testList "Page" [
     testTask "CountListed succeeds" {
         do! PageDataTests.``CountListed succeeds`` (mkData ())
     }
+    testList "FindById" [
+        testTask "succeeds when a page is found" {
+            do! PageDataTests.``FindById succeeds when a page is found`` (mkData ())
+        }
+        testTask "succeeds when a page is not found (incorrect weblog)" {
+            do! PageDataTests.``FindById succeeds when a page is not found (incorrect weblog)`` (mkData ())
+        }
+        testTask "succeeds when a page is not found (bad page ID)" {
+            do! PageDataTests.``FindById succeeds when a page is not found (bad page ID)`` (mkData ())
+        }
+    ]
+    testList "FindFullById" [
+        testTask "succeeds when a page is found" {
+            do! PageDataTests.``FindFullById succeeds when a page is found`` (mkData ())
+        }
+        testTask "succeeds when a page is not found" {
+            do! PageDataTests.``FindFullById succeeds when a page is not found`` (mkData ())
+        }
+    ]
 ]
 
 /// Drop the throwaway PostgreSQL database

src/MyWebLog.Tests/Data/RethinkDbTests.fs

@@ -130,6 +130,25 @@ let pageTests = testList "Page" [
     testTask "CountListed succeeds" {
         do! PageDataTests.``CountListed succeeds`` data.Value
     }
+    testList "FindById" [
+        testTask "succeeds when a page is found" {
+            do! PageDataTests.``FindById succeeds when a page is found`` data.Value
+        }
+        testTask "succeeds when a page is not found (incorrect weblog)" {
+            do! PageDataTests.``FindById succeeds when a page is not found (incorrect weblog)`` data.Value
+        }
+        testTask "succeeds when a page is not found (bad page ID)" {
+            do! PageDataTests.``FindById succeeds when a page is not found (bad page ID)`` data.Value
+        }
+    ]
+    testList "FindFullById" [
+        testTask "succeeds when a page is found" {
+            do! PageDataTests.``FindFullById succeeds when a page is found`` data.Value
+        }
+        testTask "succeeds when a page is not found" {
+            do! PageDataTests.``FindFullById succeeds when a page is not found`` data.Value
+        }
+    ]
 ]
 
 /// Drop the throwaway RethinkDB database

src/MyWebLog.Tests/Data/SQLiteDataTests.fs

@@ -164,6 +164,35 @@ let pageTests = testList "Page" [
         try do! PageDataTests.``CountListed succeeds`` data
         finally dispose data
     }
+    testList "FindById" [
+        testTask "succeeds when a page is found" {
+            let data = mkData ()
+            try do! PageDataTests.``FindById succeeds when a page is found`` data
+            finally dispose data
+        }
+        testTask "succeeds when a page is not found (incorrect weblog)" {
+            let data = mkData ()
+            try do! PageDataTests.``FindById succeeds when a page is not found (incorrect weblog)`` data
+            finally dispose data
+        }
+        testTask "succeeds when a page is not found (bad page ID)" {
+            let data = mkData ()
+            try do! PageDataTests.``FindById succeeds when a page is not found (bad page ID)`` data
+            finally dispose data
+        }
+    ]
+    testList "FindFullById" [
+        testTask "succeeds when a page is found" {
+            let data = mkData ()
+            try do! PageDataTests.``FindFullById succeeds when a page is found`` data
+            finally dispose data
+        }
+        testTask "succeeds when a page is not found" {
+            let data = mkData ()
+            try do! PageDataTests.``FindFullById succeeds when a page is not found`` data
+            finally dispose data
+        }
+    ]
 ]
 
 /// Delete the SQLite database