Add ability to store column order

app/controllers/api/v1/FormDatabase.controller.js

@@ -73,12 +73,24 @@ class FormDatabase extends Controller {
         const DatabaseId = req.params.DatabaseId
         const db = await Database.findOne({UUID: DatabaseId})
         if ( !db ) return res.status(404).message('Database not found with that ID.').api({})
-        // if ( !db.accessible_by(req.user) ) return req.security.deny()
 
-        const columns = (await ColumnDef.find({ DatabaseId: db.UUID })).map(x => {
-            x.additionalData = x.data()
-            return x
-        })
+        const columns = []
+        for ( const col_id of db.ColumnIds ) {
+            const rec = await ColumnDef.findOne({UUID: col_id})
+            if ( rec ) {
+                rec.additionalData = rec.data()
+                columns.push(rec)
+            }
+        }
+
+        // Fallback for backwards compat
+        if ( columns.length < 1 ) {
+            return (await ColumnDef.find({DatabaseId: db.UUID})).map(x => {
+                x.additionalData = x.data()
+                return x
+            })
+        }
+
         return res.api(columns)
     }
 
@@ -133,6 +145,9 @@ class FormDatabase extends Controller {
             }
         }
 
+        db.ColumnIds = update_columns.map(x => x.UUID)
+        await db.save()
+
         return res.api(update_columns)
     }
 
@@ -190,7 +205,8 @@ class FormDatabase extends Controller {
             dbe.RowData.UUID = dbe.UUID
             new_recs.push(dbe)
         }
-        return res.api(new_recs)
+
+        return res.api(await this._set_indices(db, new_recs))
     }
 
     async drop_database(req, res) {
@@ -215,6 +231,28 @@ class FormDatabase extends Controller {
         return res.api({})
     }
 
+    async _set_indices(db, data) {
+        const index_columns = await ColumnDef.find({DatabaseId: db.UUID, Type: 'index'})
+
+        for ( const col of index_columns ) {
+            let max_val = 0
+            data.forEach(row => {
+                const val = row.RowData[col.field]
+                if ( val && val > max_val ) max_val = val
+            });
+
+            let next_val = max_val + 1
+            for ( const row of data ) {
+                if ( !row.RowData[col.field] ) {
+                    row.RowData[col.field] = next_val
+                    next_val += 1
+                    await row.save()
+                }
+            }
+        }
+
+        return data
+    }
 }
 
 module.exports = exports = FormDatabase

app/models/api/db/Database.model.js

@@ -1,5 +1,6 @@
 const Model = require('flitter-orm/src/model/Model')
 const uuid = require('uuid/v4')
+const ColumnDef = require('./ColumnDef.model')
 
 /*
  * Database Model
@@ -21,6 +22,10 @@ class Database extends Model {
     accessible_by(user, mode = 'view') {
         return user.can(`database:${this.UUID}:${mode}`)
     }
+
+    async get_columns() {
+        return ColumnDef.find({DatabaseId: this.UUID});
+    }
     
     // Static and instance methods can go here
 }