質問編集履歴
2
promiseにresolveを追加
test
CHANGED
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File without changes
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test
CHANGED
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@@ -24,7 +24,7 @@
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ご指摘頂いた内容にて、
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~~ご指摘頂いた内容にて、
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1,openIndexeddb関数にpromiseを追加
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@@ -38,7 +38,13 @@
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どこを修正すれば、良いのでしょうか？
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~~
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ありがとうございます。
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再度ご指摘頂いた内容で修正し、動作はしたようですが、知識不足な点が多いため、勉強します。
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```
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@@ -94,226 +100,236 @@
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function openIndexeddb(){
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function openIndexeddb(){
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return new Promise(
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return new Promise((resolve,reject) =>{
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alert("１データベースを開く");
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alert("１データベースを開く");
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if (indexedDB) {
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if (indexedDB) {
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// データベースを削除したい場合はコメントを外します。
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// データベースを削除したい場合はコメントを外します。
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//indexedDB.deleteDatabase("mydb");
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//indexedDB.deleteDatabase("mydb");
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var openRequest = indexedDB.open("mydb", 1.0);
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var openRequest = indexedDB.open("mydb", 1.0);
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openRequest.onupgradeneeded = function(event) {
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openRequest.onupgradeneeded = function(event) {
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// データベースのバージョンに変更があった場合
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// データベースのバージョンに変更があった場合
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db = event.target.result;
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db = event.target.result;
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console.log(db);
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var store = db.createObjectStore("mystore", { keyPath: "mykey",autoIncrement:true});
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var store = db.createObjectStore("mystore", { keyPath: "mykey",autoIncrement:true});
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console.log(store);
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}
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openRequest.onsuccess = function(event) {
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db = event.target.result;
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resolve(db);
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console.log(db);
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alert("２データベースを開くことに成功");
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}
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} else {
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window.alert("このブラウザではIndexed DataBase API は使えません。");
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}
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})
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}
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//データ一覧表示
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function displayAlldate() {
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alert("３データ一覧表示");
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var result = document.getElementById("contsPage2id");
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result.innerHTML = "";
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var transaction = db.transaction(["mystore"], "readwrite");
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var store = transaction.objectStore("mystore");
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var request = store.openCursor();
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request.onsuccess = function (event) {
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if(event.target.result == null) {
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return;
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}
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var cursor = event.target.result;
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var data = cursor.value;
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result.innerHTML += "<table border='1'><td>"+"key：" + cursor.key + "</td>" +"<td>"+"value：" + data.myvalue + " value2：" + data.myvalue2 +"</td></table>";
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cursor.continue();
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}
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}
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//データ入力欄、保存ボタン表示
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function makeInputfield(){
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alert("４データ入力欄表示");
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const result = document.getElementById("contsPage1id");
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if (!result.hasChildNodes()){
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const input1 = document.createElement("input");
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input1.setAttribute("type","text");
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var newvalue = newvalue;
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input1.setAttribute("id","newvalue");
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input1.setAttribute("name","newvalue");
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result.appendChild(input1);
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const input2 = document.createElement("input");
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input2.setAttribute("type","text");
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var newvalue2 = newvalue2;
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input2.setAttribute("id","newvalue2");
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input2.setAttribute("name","newvalue2");
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result.appendChild(input2);
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const input3 = document.createElement("input");
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input3.setAttribute("type","text");
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var newkey = newkey;
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input3.setAttribute("id","newkey");
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input3.setAttribute("name","newkey");
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result.appendChild(input3);
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const input4 = document.createElement("input");
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input4.setAttribute("type","button");
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input4.setAttribute('onclick','saveBtn(\'' + newkey + '\',\'' + newvalue + '\',\'' + newvalue2 + '\');');
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input4.setAttribute("value","保存");
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result.appendChild(input4);
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}
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}
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//データ保存ボタン
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function saveBtn(newkey,newvalue,newvalue2){
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var value = newvalue;
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var value2 = newvalue2;
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var key = newkey;
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function transactStore(event){
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var transaction = db.transaction(["mystore"], "readwrite");
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var store = transaction.objectStore("mystore");
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function putStore(event){
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var value = document.getElementById("newvalue").value;
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var value2 = document.getElementById("newvalue2").value;
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var key = document.getElementById("newkey").value;
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var requestupdate = store.put({mykey: key, myvalue: value, myvalue2: value2});
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requestupdate.onsuccess = function(event){
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document.getElementById("newvalue").value = "";
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document.getElementById("newvalue2").value = "";
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document.getElementById("newkey").value = "";
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alert("
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alert("保存しました。");
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displayAlldate();
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}
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}
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putStore(event);
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window.alert("このブラウザではIndexed DataBase API は使えません。");
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}
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transactStore(event);
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}
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}
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function displayAlldate() {
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alert("３データ一覧表示");
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var result = document.getElementById("contsPage2id");
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result.innerHTML = "";
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var transaction = db.transaction(["mystore"], "readwrite");
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var store = transaction.objectStore("mystore");
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var request = store.openCursor();
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request.onsuccess = function (event) {
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if(event.target.result == null) {
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saveBtn;
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}
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var cursor = event.target.result;
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var data = cursor.value;
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result.innerHTML += "<table border='1'><td>"+"key：" + cursor.key + "</td>" +"<td>"+"value：" + data.myvalue + " value2：" + data.myvalue2 +"</td></table>";
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cursor.continue();
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}
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}
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//データ入力欄、保存ボタン表示
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function makeInputfield(){
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alert("４データ入力欄表示");
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const result = document.getElementById("contsPage1id");
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if (!result.hasChildNodes()){
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const input1 = document.createElement("input");
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input1.setAttribute("type","text");
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var newvalue = newvalue;
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input1.setAttribute("id","newvalue");
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input1.setAttribute("name","newvalue");
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result.appendChild(input1);
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const input2 = document.createElement("input");
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input2.setAttribute("type","text");
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var newvalue2 = newvalue2;
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input2.setAttribute("id","newvalue2");
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input2.setAttribute("name","newvalue2");
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result.appendChild(input2);
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const input3 = document.createElement("input");
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input3.setAttribute("type","text");
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var newkey = newkey;
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input3.setAttribute("id","newkey");
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input3.setAttribute("name","newkey");
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result.appendChild(input3);
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const input4 = document.createElement("input");
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input4.setAttribute("type","button");
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input4.setAttribute('onclick','saveBtn(\'' + newkey + '\',\'' + newvalue + '\',\'' + newvalue2 + '\');');
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input4.setAttribute("value","保存");
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result.appendChild(input4);
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}
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}
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|
-
//データ保存ボタン
|
|
254
|
-
|
|
255
|
-
function saveBtn(newkey,newvalue,newvalue2){
|
|
256
|
-
|
|
257
|
-
var value = newvalue;
|
|
258
|
-
|
|
259
|
-
var value2 = newvalue2;
|
|
260
|
-
|
|
261
|
-
var key = newkey;
|
|
262
|
-
|
|
263
|
-
|
|
264
|
-
|
|
265
|
-
function transactStore(event){
|
|
266
|
-
|
|
267
|
-
var transaction = db.transaction(["mystore"], "readwrite");
|
|
268
|
-
|
|
269
|
-
var store = transaction.objectStore("mystore");
|
|
270
|
-
|
|
271
|
-
|
|
272
|
-
|
|
273
|
-
function putStore(event){
|
|
274
|
-
|
|
275
|
-
var value = document.getElementById("newvalue").value;
|
|
276
|
-
|
|
277
|
-
var value2 = document.getElementById("newvalue2").value;
|
|
278
|
-
|
|
279
|
-
var key = document.getElementById("newkey").value;
|
|
280
|
-
|
|
281
|
-
var requestupdate = store.put({mykey: key, myvalue: value, myvalue2: value2});
|
|
282
|
-
|
|
283
|
-
|
|
284
|
-
|
|
285
|
-
requestupdate.onsuccess = function(event){
|
|
286
|
-
|
|
287
|
-
document.getElementById("newvalue").value = "";
|
|
288
|
-
|
|
289
|
-
document.getElementById("newvalue2").value = "";
|
|
290
|
-
|
|
291
|
-
document.getElementById("newkey").value = "";
|
|
292
|
-
|
|
293
|
-
|
|
294
|
-
|
|
295
|
-
alert("保存しました。");
|
|
296
|
-
|
|
297
|
-
|
|
298
|
-
|
|
299
|
-
displayAlldate();
|
|
300
|
-
|
|
301
|
-
}
|
|
302
|
-
|
|
303
|
-
}
|
|
304
|
-
|
|
305
|
-
putStore(event);
|
|
306
|
-
|
|
307
|
-
}
|
|
308
|
-
|
|
309
|
-
transactStore(event);
|
|
310
|
-
|
|
311
|
-
}
|
|
312
|
-
|
|
313
|
-
saveBtn;
|
|
314
|
-
|
|
315
|
-
|
|
316
|
-
|
|
317
333
|
</script>
|
|
318
334
|
|
|
319
335
|
</body>
|
1
openIndexeddb関数へのpromiseの追加、async/awaitの付与
test
CHANGED
|
File without changes
|
test
CHANGED
|
@@ -14,11 +14,25 @@
|
|
|
14
14
|
|
|
15
15
|
以下のopenIndexeddb関数内のopenRequest.onsuccess実行後に、displayAlldate関数を実行したいのですが、
|
|
16
16
|
|
|
17
|
-
実行前にdisplayAlldate関数が実行されてしまいます。
|
|
17
|
+
~~実行前にdisplayAlldate関数が実行されてしまいます。
|
|
18
|
+
|
|
18
|
-
|
|
19
|
+
~~
|
|
19
|
-
|
|
20
|
-
|
|
20
|
+
|
|
21
|
-
エラー：ncaught (in promise) TypeError: Cannot read property 'transaction' of undefined at displayAlldate
|
|
21
|
+
~~エラー：ncaught (in promise) TypeError: Cannot read property 'transaction' of undefined at displayAlldate
|
|
22
|
+
|
|
23
|
+
~~
|
|
24
|
+
|
|
25
|
+
|
|
26
|
+
|
|
27
|
+
ご指摘頂いた内容にて、
|
|
28
|
+
|
|
29
|
+
1,openIndexeddb関数にpromiseを追加
|
|
30
|
+
|
|
31
|
+
2,async/awaitでopenIndexeddb関数にawaitを付与しました。
|
|
32
|
+
|
|
33
|
+
|
|
34
|
+
|
|
35
|
+
ただ、同関数の実行後に、他のdisplayAlldate関数→makeInputfield関数が実行されません。
|
|
22
36
|
|
|
23
37
|
|
|
24
38
|
|
|
@@ -54,17 +68,21 @@
|
|
|
54
68
|
|
|
55
69
|
<script>
|
|
56
70
|
|
|
57
|
-
//promiseによる実行順序の制御（openIndexeddb→displayAlldate→makeInputfieldの順番で実行）
|
|
71
|
+
//promiseによる実行順序の制御（openIndexeddb実行後→displayAlldate→makeInputfieldの順番で実行）
|
|
72
|
+
|
|
58
|
-
|
|
73
|
+
start();
|
|
74
|
+
|
|
59
|
-
|
|
75
|
+
async function start(){
|
|
60
|
-
|
|
61
|
-
|
|
76
|
+
|
|
62
|
-
|
|
63
|
-
|
|
77
|
+
await openIndexeddb();
|
|
64
|
-
|
|
78
|
+
|
|
65
|
-
|
|
79
|
+
displayAlldate();
|
|
66
|
-
|
|
80
|
+
|
|
67
|
-
|
|
81
|
+
makeInputfield();
|
|
82
|
+
|
|
83
|
+
}
|
|
84
|
+
|
|
85
|
+
|
|
68
86
|
|
|
69
87
|
|
|
70
88
|
|
|
@@ -78,9 +96,11 @@
|
|
|
78
96
|
|
|
79
97
|
function openIndexeddb(){
|
|
80
98
|
|
|
99
|
+
return new Promise(function(){
|
|
100
|
+
|
|
81
|
-
alert("１データベースを開く");
|
|
101
|
+
alert("１データベースを開く");
|
|
82
|
-
|
|
102
|
+
|
|
83
|
-
if (indexedDB) {
|
|
103
|
+
if (indexedDB) {
|
|
84
104
|
|
|
85
105
|
// データベースを削除したい場合はコメントを外します。
|
|
86
106
|
|
|
@@ -112,13 +132,17 @@
|
|
|
112
132
|
|
|
113
133
|
}
|
|
114
134
|
|
|
135
|
+
});
|
|
136
|
+
|
|
115
|
-
}
|
|
137
|
+
}
|
|
116
|
-
|
|
117
|
-
|
|
138
|
+
|
|
139
|
+
|
|
140
|
+
|
|
141
|
+
|
|
118
142
|
|
|
119
143
|
//データ一覧表示
|
|
120
144
|
|
|
121
|
-
function displayAlldate(
|
|
145
|
+
function displayAlldate() {
|
|
122
146
|
|
|
123
147
|
alert("３データ一覧表示");
|
|
124
148
|
|
|
@@ -152,7 +176,7 @@
|
|
|
152
176
|
|
|
153
177
|
}
|
|
154
178
|
|
|
155
|
-
|
|
179
|
+
|
|
156
180
|
|
|
157
181
|
|
|
158
182
|
|
|
@@ -222,7 +246,7 @@
|
|
|
222
246
|
|
|
223
247
|
}
|
|
224
248
|
|
|
225
|
-
|
|
249
|
+
|
|
226
250
|
|
|
227
251
|
|
|
228
252
|
|
|
@@ -288,9 +312,7 @@
|
|
|
288
312
|
|
|
289
313
|
saveBtn;
|
|
290
314
|
|
|
291
|
-
|
|
292
|
-
|
|
293
|
-
|
|
315
|
+
|
|
294
316
|
|
|
295
317
|
</script>
|
|
296
318
|
|