recursive delete cascade

packages/datalib/src/ChangeSet.ts

@@ -300,7 +300,7 @@ function changeSetUpdateToSql(item: ChangeSetItem): Update {
   };
 }
 
-export function changeSetDeleteToSql(item: ChangeSetItem): Delete {
+function changeSetDeleteToSql(item: ChangeSetItem): Delete {
   return {
     from: {
       name: {

packages/datalib/src/deleteCascade.ts

@@ -1,23 +1,38 @@
 import _ from 'lodash';
 import { Command, Insert, Update, Delete, UpdateField, Condition, AllowIdentityInsert } from 'dbgate-sqltree';
-import { NamedObjectInfo, DatabaseInfo } from 'dbgate-types';
-import { ChangeSet, extractChangeSetCondition, changeSetDeleteToSql } from './ChangeSet';
+import { NamedObjectInfo, DatabaseInfo, ForeignKeyInfo, TableInfo } from 'dbgate-types';
+import { ChangeSet, ChangeSetItem, extractChangeSetCondition } from './ChangeSet';
 
 export interface ChangeSetDeleteCascade {
   title: string;
   commands: Command[];
 }
 
-export function getDeleteCascades(changeSet: ChangeSet, dbinfo: DatabaseInfo): ChangeSetDeleteCascade[] {
-  const res: ChangeSetDeleteCascade[] = [];
-  const allForeignKeys = _.flatten(dbinfo.tables.map(x => x.foreignKeys));
-  for (const baseCmd of changeSet.deletes) {
-    const table = dbinfo.tables.find(x => x.pureName == baseCmd.pureName && x.schemaName == baseCmd.schemaName);
-    if (!table.primaryKey) continue;
+// function getDeleteScript()
+
+function processDependencies(
+  changeSet: ChangeSet,
+  result: ChangeSetDeleteCascade[],
+  allForeignKeys: ForeignKeyInfo[],
+  fkPath: ForeignKeyInfo[],
+  table: TableInfo,
+  baseCmd: ChangeSetItem,
+  dbinfo: DatabaseInfo
+) {
   const dependencies = allForeignKeys.filter(
     x => x.refSchemaName == table.schemaName && x.refTableName == table.pureName
   );
+
   for (const fk of dependencies) {
+    if (fk.pureName == baseCmd.pureName) continue;
+    if (result.find(x => x.title == fk.pureName)) continue;
+
+    const depTable = dbinfo.tables.find(x => x.pureName == fk.pureName && x.schemaName == fk.schemaName);
+    const subFkPath = [...fkPath, fk];
+    if (depTable) {
+      processDependencies(changeSet, result, allForeignKeys, subFkPath, depTable, baseCmd, dbinfo);
+    }
+
     const refCmd: Delete = {
       commandType: 'delete',
       from: {
@@ -35,36 +50,34 @@ export function getDeleteCascades(changeSet: ChangeSet, dbinfo: DatabaseInfo): C
               pureName: fk.pureName,
               schemaName: fk.schemaName,
             },
-              alias: 't1',
-              relations: [
-                {
+            alias: 't0',
+            relations: subFkPath.map((fkItem, fkIndex) => ({
               joinType: 'INNER JOIN',
-                  alias: 't2',
+              alias: `t${fkIndex + 1}`,
               name: {
-                    pureName: fk.refTableName,
-                    schemaName: fk.refSchemaName,
+                pureName: fkItem.refTableName,
+                schemaName: fkItem.refSchemaName,
               },
-                  conditions: fk.columns.map(column => ({
+              conditions: fkItem.columns.map(column => ({
                 conditionType: 'binary',
                 operator: '=',
                 left: {
                   exprType: 'column',
                   columnName: column.columnName,
-                      source: { alias: 't1' },
+                  source: { alias: `t${fkIndex}` },
                 },
                 right: {
                   exprType: 'column',
                   columnName: column.refColumnName,
-                      source: { alias: 't2' },
+                  source: { alias: `t${fkIndex + 1}` },
                 },
               })),
-                },
-              ],
+            })),
           },
           where: {
             conditionType: 'and',
             conditions: [
-                extractChangeSetCondition(baseCmd, 't2'),
+              extractChangeSetCondition(baseCmd, `t${subFkPath.length}`),
               // @ts-ignore
               ...table.primaryKey.columns.map(column => ({
                 conditionType: 'binary',
@@ -72,16 +85,13 @@ export function getDeleteCascades(changeSet: ChangeSet, dbinfo: DatabaseInfo): C
                 left: {
                   exprType: 'column',
                   columnName: column.columnName,
-                    source: { alias: 't1' },
+                  source: { alias: 't0' },
                 },
                 right: {
                   exprType: 'column',
                   columnName: column.columnName,
                   source: {
-                      name: {
-                        pureName: fk.refTableName,
-                        schemaName: fk.refSchemaName,
-                      },
+                    name: fk,
                   },
                 },
               })),
@@ -90,28 +100,37 @@ export function getDeleteCascades(changeSet: ChangeSet, dbinfo: DatabaseInfo): C
         },
       },
     };
-      let resItem = res.find(x => x.title == fk.pureName);
+    let resItem = result.find(x => x.title == fk.pureName);
     if (!resItem) {
       resItem = {
         title: fk.pureName,
         commands: [],
       };
-        res.push(resItem);
+      result.push(resItem);
     }
     resItem.commands.push(refCmd);
   }
-
-    let resItem = res.find(x => x.title == baseCmd.pureName);
-    if (!resItem) {
-      resItem = {
-        title: baseCmd.pureName,
-        commands: [],
-      };
-      res.push(resItem);
 }
 
-    resItem.commands.push(changeSetDeleteToSql(baseCmd));
+export function getDeleteCascades(changeSet: ChangeSet, dbinfo: DatabaseInfo): ChangeSetDeleteCascade[] {
+  const result: ChangeSetDeleteCascade[] = [];
+  const allForeignKeys = _.flatten(dbinfo.tables.map(x => x.foreignKeys));
+  for (const baseCmd of changeSet.deletes) {
+    const table = dbinfo.tables.find(x => x.pureName == baseCmd.pureName && x.schemaName == baseCmd.schemaName);
+    if (!table.primaryKey) continue;
+
+    processDependencies(changeSet, result, allForeignKeys, [], table, baseCmd, dbinfo);
+
+    // let resItem = result.find(x => x.title == baseCmd.pureName);
+    // if (!resItem) {
+    //   resItem = {
+    //     title: baseCmd.pureName,
+    //     commands: [],
+    //   };
+    //   result.push(resItem);
+    // }
+    // resItem.commands.push(changeSetDeleteToSql(baseCmd));
   }
 
-  return res;
+  return result;
 }

packages/web/src/modals/ConfirmSqlModal.svelte

@@ -32,10 +32,12 @@
         <SqlEditor
           {engine}
           value={values.deleteReferencesCascade
-            ? deleteCascadesScripts
+            ? [
+                ...deleteCascadesScripts
                   .filter(({ script, title }) => values[`deleteReferences_${title}`] !== false)
-                .map(({ script, title }) => script)
-                .join('\n')
+                  .map(({ script, title }) => script),
+                sql,
+              ].join('\n')
             : sql}
           readOnly
         />
@@ -43,23 +45,32 @@
     </div>
 
     {#if !_.isEmpty(deleteCascadesScripts)}
+      <div class="mt-2">
         <FormCheckboxField
           templateProps={{ noMargin: true }}
           label="Delete references CASCADE"
           name="deleteReferencesCascade"
         />
+      </div>
     {/if}
 
     <FormValues let:values>
       {#if values.deleteReferencesCascade}
+        <!-- <div class="form-margin flex">
+      </div> -->
+
+        <div class="form-margin flex">
           {#each _.sortBy(deleteCascadesScripts, 'title') as deleteTable}
+            <div class="mr-1">
               <FormCheckboxField
                 defaultValue={true}
                 templateProps={{ noMargin: true }}
                 label={deleteTable.title}
                 name={`deleteReferences_${deleteTable.title}`}
               />
+            </div>
           {/each}
+        </div>
       {/if}
     </FormValues>
 
@@ -86,10 +97,12 @@
             closeCurrentModal();
             onConfirm(
               e.detail.deleteReferencesCascade
-                ? deleteCascadesScripts
+                ? [
+                    ...deleteCascadesScripts
                       .filter(({ script, title }) => e.detail[`deleteReferences_${title}`] !== false)
-                    .map(({ script, title }) => script)
-                    .join('\n')
+                      .map(({ script, title }) => script),
+                    sql,
+                  ].join('\n')
                 : null
             );
           }}