91 lines
3.6 KiB
Forth
91 lines
3.6 KiB
Forth
module MyWebLog.Data.SetUp
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open Rethink
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open RethinkDb.Driver.Ast
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open System
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let private r = RethinkDb.Driver.RethinkDB.R
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let private logStep step = Console.Out.WriteLine (sprintf "[myWebLog] %s" step)
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let private logStepStart text = Console.Out.Write (sprintf "[myWebLog] %s..." text)
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let private logStepDone () = Console.Out.WriteLine (" done.")
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/// Ensure the myWebLog database exists
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let private checkDatabase (cfg : DataConfig) =
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logStep "|> Checking database"
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let dbs = r.DbList().RunListAsync<string>(cfg.Conn) |> await
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match dbs.Contains cfg.Database with
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| true -> ()
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| _ -> logStepStart (sprintf " %s database not found - creating" cfg.Database)
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r.DbCreate(cfg.Database).RunResultAsync(cfg.Conn) |> await |> ignore
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logStepDone ()
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/// Ensure all required tables exist
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let private checkTables cfg =
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logStep "|> Checking tables"
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let tables = r.Db(cfg.Database).TableList().RunListAsync<string>(cfg.Conn) |> await
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[ Table.Category; Table.Comment; Table.Page; Table.Post; Table.User; Table.WebLog ]
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|> List.map (fun tbl -> match tables.Contains tbl with true -> None | _ -> Some (tbl, r.TableCreate tbl))
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|> List.filter Option.isSome
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|> List.map Option.get
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|> List.iter (fun (tbl, create) -> logStepStart (sprintf " Creating table %s" tbl)
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create.RunResultAsync(cfg.Conn) |> await |> ignore
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logStepDone ())
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/// Shorthand to get the table
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let private tbl cfg table = r.Db(cfg.Database).Table(table)
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/// Create the given index
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let private createIndex cfg table (index : string * (ReqlExpr -> obj) option) =
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let idxName, idxFunc = index
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logStepStart (sprintf """ Creating index "%s" on table %s""" idxName table)
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(match idxFunc with
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| Some f -> (tbl cfg table).IndexCreate(idxName, f)
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| None -> (tbl cfg table).IndexCreate(idxName))
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.RunResultAsync(cfg.Conn)
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|> await |> ignore
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(tbl cfg table).IndexWait(idxName).RunAtomAsync(cfg.Conn) |> await |> ignore
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logStepDone ()
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/// Ensure that the given indexes exist, and create them if required
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let private ensureIndexes cfg (indexes : (string * (string * (ReqlExpr -> obj) option) list) list) =
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let ensureForTable (tblName, idxs) =
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let idx = (tbl cfg tblName).IndexList().RunListAsync<string>(cfg.Conn) |> await
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idxs
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|> List.iter (fun index -> match idx.Contains (fst index) with true -> () | _ -> createIndex cfg tblName index)
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indexes
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|> List.iter ensureForTable
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/// Create an index on web log Id and the given field
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let private webLogField (name : string) : (ReqlExpr -> obj) option =
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Some <| fun row -> upcast r.Array(row.["WebLogId"], row.[name])
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/// Ensure all the required indexes exist
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let private checkIndexes cfg =
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logStep "|> Checking indexes"
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[ Table.Category, [ "WebLogId", None
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"Slug", webLogField "Slug"
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]
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Table.Comment, [ "PostId", None
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]
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Table.Page, [ "WebLogId", None
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"Permalink", webLogField "Permalink"
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]
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Table.Post, [ "WebLogId", None
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"WebLogAndStatus", webLogField "Status"
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"Permalink", webLogField "Permalink"
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]
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Table.User, [ "UserName", None
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]
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Table.WebLog, [ "UrlBase", None
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]
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]
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|> ensureIndexes cfg
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/// Start up checks to ensure the database, tables, and indexes exist
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let startUpCheck cfg =
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logStep "Database Start Up Checks Starting"
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checkDatabase cfg
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checkTables cfg
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checkIndexes cfg
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logStep "Database Start Up Checks Complete"
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