Fix tests, reinstate old workaround.

packages/server/src/api/routes/tests/table.spec.ts

@@ -1246,10 +1246,7 @@ if (descriptions.length) {
       })
 
       describe.each([
-        [
-          RowExportFormat.CSV,
-          (val: any) => JSON.stringify(val).replace(/"/g, "'"),
-        ],
+        [RowExportFormat.CSV, (val: any) => JSON.stringify(val)],
         [RowExportFormat.JSON, (val: any) => val],
       ])("import validation (%s)", (_, userParser) => {
         const basicSchema: TableSchema = {

packages/server/src/utilities/schema.ts

@@ -270,6 +270,26 @@ function parseJsonExport<T>(value: any) {
   if (typeof value !== "string") {
     return value
   }
+
+  try {
     const parsed = JSON.parse(value)
+
+    return parsed as T
+  } catch (e: any) {
+    if (
+      e.message.startsWith("Expected property name or '}' in JSON at position ")
+    ) {
+      // In order to store JSON within CSVs what we used to do is replace double
+      // quotes with single quotes. This results in invalid JSON, so the line
+      // below is a workaround to parse it. However, this method of storing JSON
+      // was never valid, and we don't do it anymore. However, people may have
+      // exported data and stored it, hoping to be able to restore it later, so
+      // we leave this in place to support that.
+      const parsed = JSON.parse(value.replace(/'/g, '"'))
       return parsed as T
     }
+
+    // It is not valid JSON
+    throw e
+  }
+}