Make the logging namespace GC-safe.

Recognize versions of timestamps with 'T' as the date/time separator.
For example, compare:

    '2021-08-01 23:14:00-05:00'
    '2021-08-01T23:14:00-05:00'

This commit adds support for the second flavor (and it's variations).

fiber_orm.nimble

@@ -1,6 +1,6 @@
 # Package
 
-version       = "0.3.1"
+version       = "0.3.6"
 author        = "Jonathan Bernard"
 description   = "Lightweight Postgres ORM for Nim."
 license       = "GPL-3.0"
@@ -11,3 +11,4 @@ srcDir        = "src"
 # Dependencies
 
 requires "nim >= 1.4.0"
+requires "https://git.jdb-software.com/jdb/nim-namespaced-logging.git"

src/fiber_orm.nim

@@ -1,11 +1,26 @@
 import db_postgres, macros, options, sequtils, strutils, uuids
+import namespaced_logging
 
 from unicode import capitalize
 
 import ./fiber_orm/util
+export
+  util.columnNamesForModel,
+  util.dbFormat,
+  util.dbNameToIdent,
+  util.identNameToDb,
+  util.modelName,
+  util.rowToModel,
+  util.tableName
 
 type NotFoundError* = object of CatchableError
 
+var logNs {.threadvar.}: LoggingNamespace
+
+template log(): untyped =
+  if logNs.isNil: logNs = initLoggingNamespace(name = "fiber_orm", level = lvlDebug)
+  logNs
+
 proc newMutateClauses(): MutateClauses =
   return MutateClauses(
     columns: @[],
@@ -18,11 +33,14 @@ proc createRecord*[T](db: DbConn, rec: T): T =
 
   # Confusingly, getRow allows inserts and updates. We use it to get back the ID
   # we want from the row.
-  let newRow = db.getRow(sql(
+  let sqlStmt =
     "INSERT INTO " & tableName(rec) &
     " (" & mc.columns.join(",") & ") " &
     " VALUES (" & mc.placeholders.join(",") & ") " &
-    " RETURNING *"), mc.values)
+    " RETURNING *"
+
+  log().debug "createRecord: [" & sqlStmt & "]"
+  let newRow = db.getRow(sql(sqlStmt), mc.values)
 
   result = rowToModel(T, newRow)
 
@@ -31,24 +49,34 @@ proc updateRecord*[T](db: DbConn, rec: T): bool =
   populateMutateClauses(rec, false, mc)
 
   let setClause = zip(mc.columns, mc.placeholders).mapIt(it[0] & " = " & it[1]).join(",")
-  let numRowsUpdated = db.execAffectedRows(sql(
+  let sqlStmt =
     "UPDATE " & tableName(rec) &
     " SET " & setClause &
-    " WHERE id = ? "), mc.values.concat(@[$rec.id]))
+    " WHERE id = ? "
+
+  log().debug "updateRecord: [" & sqlStmt & "] id: " & $rec.id
+  let numRowsUpdated = db.execAffectedRows(sql(sqlStmt), mc.values.concat(@[$rec.id]))
 
   return numRowsUpdated > 0;
 
 template deleteRecord*(db: DbConn, modelType: type, id: typed): untyped =
-  db.tryExec(sql("DELETE FROM " & tableName(modelType) & " WHERE id = ?"), $id)
+  let sqlStmt = "DELETE FROM " & tableName(modelType) & " WHERE id = ?"
+  log().debug "deleteRecord: [" & sqlStmt & "] id: " & $id
+  db.tryExec(sql(sqlStmt), $id)
 
 proc deleteRecord*[T](db: DbConn, rec: T): bool =
-  return db.tryExec(sql("DELETE FROM " & tableName(rec) & " WHERE id = ?"), $rec.id)
+  let sqlStmt = "DELETE FROM " & tableName(rec) & " WHERE id = ?"
+  log().debug "deleteRecord: [" & sqlStmt & "] id: " & $rec.id
+  return db.tryExec(sql(sqlStmt), $rec.id)
 
 template getRecord*(db: DbConn, modelType: type, id: typed): untyped =
-  let row = db.getRow(sql(
+  let sqlStmt =
     "SELECT " & columnNamesForModel(modelType).join(",") &
     " FROM " & tableName(modelType) &
-    " WHERE id = ?"), @[$id])
+    " WHERE id = ?"
+
+  log().debug "getRecord: [" & sqlStmt & "] id: " & $id
+  let row = db.getRow(sql(sqlStmt), @[$id])
 
   if allIt(row, it.len == 0):
     raise newException(NotFoundError, "no " & modelName(modelType) & " record for id " & $id)
@@ -56,25 +84,31 @@ template getRecord*(db: DbConn, modelType: type, id: typed): untyped =
   rowToModel(modelType, row)
 
 template findRecordsWhere*(db: DbConn, modelType: type, whereClause: string, values: varargs[string, dbFormat]): untyped =
-  db.getAllRows(sql(
+  let sqlStmt =
     "SELECT " & columnNamesForModel(modelType).join(",") &
     " FROM " & tableName(modelType) &
-    " WHERE " & whereClause), values)
+    " WHERE " & whereClause
-    .mapIt(rowToModel(modelType, it))
+
+  log().debug "findRecordsWhere: [" & sqlStmt & "] values: (" & values.join(", ") & ")"
+  db.getAllRows(sql(sqlStmt), values).mapIt(rowToModel(modelType, it))
 
 template getAllRecords*(db: DbConn, modelType: type): untyped =
-  db.getAllRows(sql(
+  let sqlStmt =
     "SELECT " & columnNamesForModel(modelType).join(",") &
-    " FROM " & tableName(modelType)))
+    " FROM " & tableName(modelType)
-    .mapIt(rowToModel(modelType, it))
+
+  log().debug "getAllRecords: [" & sqlStmt & "]"
+  db.getAllRows(sql(sqlStmt)).mapIt(rowToModel(modelType, it))
 
 template findRecordsBy*(db: DbConn, modelType: type, lookups: seq[tuple[field: string, value: string]]): untyped =
-  db.getAllRows(sql(
+  let sqlStmt =
     "SELECT " & columnNamesForModel(modelType).join(",") &
     " FROM " & tableName(modelType) &
-    " WHERE " & lookups.mapIt(it.field & " = ?").join(" AND ")),
+    " WHERE " & lookups.mapIt(it.field & " = ?").join(" AND ")
-    lookups.mapIt(it.value))
+  let values = lookups.mapIt(it.value)
-  .mapIt(rowToModel(modelType, it))
+
+  log().debug "findRecordsBy: [" & sqlStmt & "] values (" & values.join(", ") & ")"
+  db.getAllRows(sql(sqlStmt), values).mapIt(rowToModel(modelType, it))
 
 macro generateProcsForModels*(dbType: type, modelTypes: openarray[type]): untyped =
   result = newStmtList()

src/fiber_orm/util.nim

@@ -67,34 +67,38 @@ proc parsePGDatetime*(val: string): DateTime =
 
   const PG_TIMESTAMP_FORMATS = [
     "yyyy-MM-dd HH:mm:ss",
+    "yyyy-MM-dd'T'HH:mm:ss",
     "yyyy-MM-dd HH:mm:sszz",
+    "yyyy-MM-dd'T'HH:mm:sszz",
     "yyyy-MM-dd HH:mm:ss'.'fff",
-    "yyyy-MM-dd HH:mm:ss'.'fffzz"
+    "yyyy-MM-dd'T'HH:mm:ss'.'fff",
+    "yyyy-MM-dd HH:mm:ss'.'fffzz",
+    "yyyy-MM-dd'T'HH:mm:ss'.'fffzz",
+    "yyyy-MM-dd HH:mm:ss'.'fffzzz",
+    "yyyy-MM-dd'T'HH:mm:ss'.'fffzzz",
   ]
 
-  let PG_PARTIAL_FORMAT_REGEX = re"(\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}\.)(\d{1,3})(\S+)?"
+  var correctedVal = val;
-
-  var errStr = ""
-
-  # Try to parse directly using known format strings.
-  for df in PG_TIMESTAMP_FORMATS:
-    try: return val.parse(df)
-    except: errStr &= "\n\t" & getCurrentExceptionMsg()
 
   # PostgreSQL will truncate any trailing 0's in the millisecond value leading
   # to values like `2020-01-01 16:42.3+00`. This cannot currently be parsed by
   # the standard times format as it expects exactly three digits for
   # millisecond values. So we have to detect this and pad out the millisecond
   # value to 3 digits.
+  let PG_PARTIAL_FORMAT_REGEX = re"(\d{4}-\d{2}-\d{2}( |'T')\d{2}:\d{2}:\d{2}\.)(\d{1,2})(\S+)?"
   let match = val.match(PG_PARTIAL_FORMAT_REGEX)
+
   if match.isSome:
     let c = match.get.captures
-    try:
+    if c.toSeq.len == 2: correctedVal = c[0] & alignLeft(c[2], 3, '0')
-      let corrected = c[0] & alignLeft(c[1], 3, '0') & c[2]
+    else: correctedVal = c[0] & alignLeft(c[2], 3, '0') & c[3]
-      return corrected.parse(PG_TIMESTAMP_FORMATS[1])
+
-    except:
+  var errStr = ""
-      errStr &= "\n\t" & PG_TIMESTAMP_FORMATS[1] &
+
-        " after padding out milliseconds to full 3-digits"
+  # Try to parse directly using known format strings.
+  for df in PG_TIMESTAMP_FORMATS:
+    try: return correctedVal.parse(df)
+    except: errStr &= "\n\t" & getCurrentExceptionMsg()
 
   raise newException(ValueError, "Cannot parse PG date. Tried:" & errStr)