我想要一个从三个输入字段中收集值的按钮,将它们传递给javascript函数,然后将它们转换为单个对象并将它们输入到IndexedDb数据库objectStore中。我已经让它输入前三个值作为对象,但在随后的onclicks上,它将它们传递给函数,但不会将它们添加到数据库中。
function callIdb(entry1, entry2, entry3) {
document.getElementById('registernewsletter').innerHTML = 'Check ' + entry1 + ' for New User Offer!';
var nameI = entry1
var ageI = entry2;
var emailI = entry3;
window.indexedDB = window.indexedDB || window.mozIndexedDB || window.webkitIndexedDB || window.msIndexedDB;
window.IDBTransaction = window.IDBTransaction || window.webkitIDBTransaction || window.msIDBTransaction || {READ_WRITE: "readwrite"}; // This line should only be needed if it is needed to support the object's constants for older browsers
window.IDBKeyRange = window.IDBKeyRange || window.webkitIDBKeyRange || window.msIDBKeyRange;
if (!window.indexedDB) {
console.log("Your browser doesn't support a stable version of IndexedDB. Such and such feature will not be available.");
} else {
console.log("You're good to go with IndexedDB");
};
var request = window.indexedDB.open("restaurantDatabase", 1);
request.onerror = function(event) {
console.log("Hi, YouFail. PleaseTry again", event);
};
var restaurantData = [];
var b = (function () {
var c = [];
return function () {
c.push({name: nameI, age: ageI, email: emailI});
return c;
}
})();
var d = b();
console.log(d);
console.log("New data: ", d, d.isArray);
d.forEach(function(rest) {
console.log("I: ", d);
});
request.onupgradeneeded = function(event) {
console.log('win upgrade');
var db = event.target.result;
console.log("OnUpgrade: db= ", db);
var oS = db.createObjectStore("restaurants", { keyPath: "email" });
oS.createIndex("name", "name", { unique: false });
oS.createIndex("email", "email", { unique: true });
oS.createIndex("age", "age", { unique: false });
oS.transaction.oncomplete = function(event) {
var rTrans = db.transaction("restaurants", "readwrite").objectStore("restaurants");
d.forEach(function(restaurant) {
rTrans.add(restaurant);
console.log("You followed directions! gd jb", restaurant, "stored in ", rTrans);
});
};
};
request.onupgradeneeded.onerror = function(event) {
console.log("err", event);
}
}
我应该加上onupgradeneeded吗?我以为db的所有编辑都必须在这个事件中。
<form id="newsletter_form" class="newsletter_form">
<input type="text" id="idbentry1" class="newsletter_input" placeholder="Restuarant Name" required="required">
<input type="text" id="idbentry2" class="newsletter_input" placeholder="Years at Location">
<input type="email" id="idbentry3" class="newsletter_input" placeholder="email">
将值插入IndexedDb()
这是第一个很好的表现:
You're good to go with IndexedDB
rapidapp.js:198 [{…}]
rapidapp.js:199 New data: [{…}] undefined
rapidapp.js:201 I: [{…}]
rapidapp.js:212 win upgrade
rapidapp.js:214 OnUpgrade: db= IDBDatabase {name: "restaurantDatabase", version: 1, objectStoreNames: DOMStringList, onabort: null, onclose: null, …}
rapidapp.js:229 You followed directions! gd jb {name: "ert", age: "ww", email: "tt"} stored in IDBObjectStore {name: "restaurants", keyPath: "email", indexNames: DOMStringList, transaction: IDBTransaction, autoIncrement: false}
这是第二个在onupgradeneeded之前停止的条目。
You're good to go with IndexedDB
rapidapp.js:198 [{…}]
rapidapp.js:199 New data: [{…}] undefined
rapidapp.js:201 I: [{…}]
终于搞定了:
function callIdb(entry1, entry2, entry3) {
document.getElementById('registernewsletter').innerHTML = 'Check ' + entry1 + ' for New User Offer!';
var nameI = entry1
var ageI = entry2;
var emailI = entry3;
window.indexedDB = window.indexedDB || window.mozIndexedDB || window.webkitIndexedDB || window.msIndexedDB;
window.IDBTransaction = window.IDBTransaction || window.webkitIDBTransaction || window.msIDBTransaction || {READ_WRITE: "readwrite"}; // This line should only be needed if it is needed to support the object's constants for older browsers
window.IDBKeyRange = window.IDBKeyRange || window.webkitIDBKeyRange || window.msIDBKeyRange;
if (!window.indexedDB) {
console.log("Your browser doesn't support a stable version of IndexedDB. Such and such feature will not be available.");
} else {
console.log("You're good to go with IndexedDB");
};
var request = window.indexedDB.open("restaurantDatabase", 1);
var b = (function () {
var c = [];
return function () {
c.push({name: nameI, age: ageI, email: emailI});
return c;
}
})();
request.onerror = function(event) {
console.log("Hi, YouFail. PleaseTry again", event);
};
var d = b();
console.log(d);
console.log("New data: ", d, d.isArray);
d.forEach(function(rest) {
console.log("I: ", d);
});
request.onupgradeneeded = function(event) {
console.log('(WINR.UGN)Within request.upgradeneeded');
var db = event.target.result;
console.log("(WINR.UGN) db:", db);
var oS = db.createObjectStore("restaurants", { keyPath: "email" });
oS.createIndex("name", "name", { unique: false });
oS.createIndex("email", "email", { unique: true });
oS.createIndex("age", "age", { unique: false });
};
request.onsuccess = function(event) {
console.log('(WOR.NS) Within request.onsuccess');
var db = event.target.result;
console.log("(WOR.NS) db= ", db);
var rTrans = db.transaction("restaurants", "readwrite").objectStore("restaurants");
d.forEach(function(restaurant) {
rTrans.add(restaurant);
console.log("You followed directions! Well done. var restaurant: ", restaurant, "stored with this transaction: ", rTrans);
});
rTrans.oncomplete = function () {
console.log("CONGRATULATIONS FOOLS.");
}
};
request.onupgradeneeded.onerror = function(event) {
console.log("err", event);
}
}
此外,这个参考文献在此过程中最有帮助:https://www.w3.org/TR/IndexedDB/#dom-idbtransactionmode-readwrite。
谢谢,皮尔