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delete cascade WIP

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This commit is contained in:
Jan Prochazka
2021-09-28 11:32:23 +02:00
parent 8910a6bd07
commit 2c2b4fc08f
3 changed files with 153 additions and 6 deletions
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110
packages/datalib/src/ChangeSet.ts
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@@ -11,6 +11,11 @@ export interface ChangeSetItem {
fields?: { [column: string]: string };
}
export interface ChangeSetDeleteCascade {
title: string;
commands: Command[];
}
export interface ChangeSet {
inserts: ChangeSetItem[];
updates: ChangeSetItem[];
@@ -118,7 +123,11 @@ export function setChangeSetValue(
};
}
export function setChangeSetRowData(changeSet: ChangeSet, definition: ChangeSetRowDefinition, document: any): ChangeSet {
export function setChangeSetRowData(
changeSet: ChangeSet,
definition: ChangeSetRowDefinition,
document: any
): ChangeSet {
if (!changeSet || !definition) return changeSet;
let [fieldName, existingItem] = findExistingChangeSetItem(changeSet, definition);
if (fieldName == 'deletes') {
@@ -257,7 +266,7 @@ function insertToSql(
];
}
function extractCondition(item: ChangeSetItem): Condition {
function extractCondition(item: ChangeSetItem, alias?: string): Condition {
return {
conditionType: 'and',
conditions: _.keys(item.condition).map(columnName => ({
@@ -271,6 +280,7 @@ function extractCondition(item: ChangeSetItem): Condition {
pureName: item.pureName,
schemaName: item.schemaName,
},
alias,
},
},
right: {
@@ -318,6 +328,102 @@ export function changeSetToSql(changeSet: ChangeSet, dbinfo: DatabaseInfo): Comm
);
}
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);
const dependencies = allForeignKeys.filter(
x => x.refSchemaName == table.schemaName && x.refTableName == table.pureName
);
for (const fk of dependencies) {
const refCmd: Delete = {
commandType: 'delete',
from: {
name: {
pureName: fk.pureName,
schemaName: fk.schemaName,
},
},
where: {
conditionType: 'exists',
subQuery: {
commandType: 'select',
from: {
name: {
pureName: fk.pureName,
schemaName: fk.schemaName,
},
alias: 't1',
relations: [
{
joinType: 'INNER JOIN',
alias: 't2',
name: {
pureName: fk.refTableName,
schemaName: fk.refSchemaName,
},
conditions: fk.columns.map(column => ({
conditionType: 'binary',
operator: '=',
left: {
exprType: 'column',
columnName: column.columnName,
source: { alias: 't1' },
},
right: {
exprType: 'column',
columnName: column.refColumnName,
source: { alias: 't2' },
},
})),
},
],
},
where: {
conditionType: 'and',
conditions: [
extractCondition(baseCmd, 't2'),
// @ts-ignore
...fk.columns.map(column => ({
conditionType: 'binary',
operator: '=',
left: {
exprType: 'column',
columnName: column.columnName,
source: { alias: 't1' },
},
right: {
exprType: 'column',
columnName: column.refColumnName,
source: {
name: {
pureName: fk.refTableName,
schemaName: fk.refSchemaName,
},
},
},
})),
],
},
},
},
};
let resItem = res.find(x => x.title == fk.pureName);
if (!resItem) {
resItem = {
title: fk.pureName,
commands: [],
};
res.push(resItem);
}
resItem.commands.push(refCmd);
}
}
return res;
}
export function revertChangeSetRowChanges(changeSet: ChangeSet, definition: ChangeSetRowDefinition): ChangeSet {
// console.log('definition', definition);
const [field, item] = findExistingChangeSetItem(changeSet, definition);