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update for new pool connection handler #6

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update for new pool connection handler #6

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bb2a84a
update for new pool connection handler
Sep 4, 2016
e5d4b74
remove unused code
Sep 4, 2016
7f4d4c8
update README.md with pool example
Sep 4, 2016
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50 changes: 44 additions & 6 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -29,6 +29,43 @@ db.transaction(function (err, transaction) {
});
```

## Pool Example

```js
var orm = require("orm");
var transaction = require("orm-transaction");

orm.connect("mysql://username:password@host/database", function (err, db) {
if (err) throw err;

db.use(transaction);

var Person = db.define("person", {
name : String,
surname : String,
age : Number
});

db.transaction(function (err, t) {

Person.create({name: "John"}, t.id, function(err, result) {

Person.find({ surname: "Doe" }).each(function (person) {
person.useConnection(t.id).remove(function () {
t.commit(function (err) {
if (!err) {
console.log("success!");
}
});
});
});

});

});
});
```

## Example

```js
Expand All @@ -48,14 +85,15 @@ orm.connect("mysql://username:password@host/database", function (err, db) {

db.transaction(function (err, t) {
Person.find({ surname: "Doe" }).each(function (person) {
person.remove();
person.remove(function () {
t.commit(function (err) {
if (!err) {
console.log("success!");
}
});
});
});

t.commit(function (err) {
if (!err) {
console.log("success!");
}
});
});
});
```
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65 changes: 48 additions & 17 deletions lib/plugin.js
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Original file line number Diff line number Diff line change
Expand Up @@ -4,28 +4,59 @@ module.exports = Plugin;

function Plugin(db) {
db.transaction = function (cb) {
db.driver.execQuery("BEGIN", function (err) {
if (err) {
return cb(err);
}
if (db.driver.opts.pool)
db.driver.createPool(function (err, id) {
if (err)
return cb(err);
db.driver.execQuery("BEGIN", id, function (err) {
if (err) {
return cb(err);
}

debug("init transaction!");
debug("init transaction!");

return cb(null, {
commit: function (cb) {
db.driver.execQuery("COMMIT", function (err) {
debug("transaction committed!");
return cb(err || null);
});
},
rollback: function (cb) {
db.driver.execQuery("ROLLBACK", function (err) {
debug("transaction rolled back!");
return cb(err || null);
return cb(null, {
id: id,
commit: function (cb) {
db.driver.execQuery("COMMIT", id, function (err) {
debug("transaction committed!");
db.driver.releasePool(id);
return cb(err || null);
});
},
rollback: function (cb) {
db.driver.execQuery("ROLLBACK", id, function (err) {
debug("transaction rolled back!");
db.driver.releasePool(id);
return cb(err || null);
});
}
});
});
});
else
db.driver.execQuery("BEGIN", function (err) {
if (err) {
return cb(err);
}

debug("init transaction!");

return cb(null, {
commit: function (cb) {
db.driver.execQuery("COMMIT", function (err) {
debug("transaction committed!");
return cb(err || null);
});
},
rollback: function (cb) {
db.driver.execQuery("ROLLBACK", function (err) {
debug("transaction rolled back!");
return cb(err || null);
});
}
});
});
});
};

return {
Expand Down