Java REST Partial Update of boolean Fields

Java REST Partial Update of boolean Fields

By : user2955612
Date : November 22 2020, 10:40 AM
hope this fix your issue I think I found the solution. Instead of using Event in Post argument, it is better to use JsonObject:
code :

public Response update((@PathParam("id") long id, JSONObject json) {
    Event _event = dao.find(id);

    _event.setFinished(json.optBoolean("finished", _event.getFinished())); // if boolean value is not provided, we don't change it

    dao.update(id, _event);


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WCF REST API Partial update of a record

WCF REST API Partial update of a record

By : Tim Carpenter
Date : March 29 2020, 07:55 AM
it helps some times After going through various strategies of handling this kind of thing I sort of implemented what was described in the answer to this question: Only update some properties on an EF entity that are not set to null.
In a nutshell I am tracking which properties were set during desrialization and then updating only those properties.
Squeryl: how to toggle a boolean column using a partial update

Squeryl: how to toggle a boolean column using a partial update

By : Florinacho
Date : March 29 2020, 07:55 AM
hope this fix your issue I made a little code project out of your example. The problem is that squeryl serializes the update, but it "swallows" the (!), producing the following SQL:
code :
 update MyEntity set
 some_flag = (some_flag)
    // From __update, Table.scala
    val dba = Session.currentSession.databaseAdapter
    val sw = new StatementWriter(dba)
    val o0 = _callbacks.beforeUpdate(o.asInstanceOf[AnyRef]).asInstanceOf[T]
    dba.writeUpdate(o0, this, sw, checkOCC)
val s = ((entity: InsertTypeHere) =>
      where(entity.id === id)
      set(entity.some_flag := not entity.some_flag))
     class NotExpression(val ast: ExpressionNode)(implicit val mapper: OutMapper[BooleanType])
        extends PrefixOperatorNode(ast, "not ", false)
                with LogicalBoolean with NestedExpression with TypedExpressionNode[BooleanType]

     def mynot(b: BooleanExpression[BooleanType]) = new NotExpression(b)

     transaction {
          update(table)(t => where(t.id === 3) set (t.some_flag := mynot(t.some_flag)))
update the nested fields in json using partial update or update queries

update the nested fields in json using partial update or update queries

By : user1748724
Date : March 29 2020, 07:55 AM
I wish this help you Your JSON has errors, I feel you should cover the strings with quotes.
A good solution to your problem is to transform the JSON to object and then transform the object back to JSON file.
code :
var  jsonT = '{"macid":"mac1234","attri":{"data":{"ch1":12,"ch2":123},"settings":{"log_time":"1min"}}}'

var f = JSON.parse(jsonT);
f.attri.data.ch1 = "hi"

jsonT = JSON.stringify(f);
REST: How to support create-Or-Update and partial-update ? (aka PUT vs PATCH)

REST: How to support create-Or-Update and partial-update ? (aka PUT vs PATCH)

By : Arty Shein
Date : March 29 2020, 07:55 AM
should help you out PUT and PATCH have differing message semantics, but the core context ("remote authoring") is the same. In both cases, the client request is "Please, server, make your representation of this resource match my local copy".
For example, I GET a JSON document from the server. I make local edits to it. Now I want to "save" my changes on the server. If the document is modest in size, I might just send the entire revised document over the network. If the document is very large, and my changes are modest, then I might instead send the patch instead.
REST API Update by partial json

REST API Update by partial json

By : Pran Nath
Date : March 29 2020, 07:55 AM
will help you If the Update request uses the same Customer struct then the struct fields could be pointers to differentiate between zero value and value not being set in the JSON.
Now all you need to do is merge existing struct into updated Consumer struct.
code :
package main

import (

type Address struct {
    City string `json:"city"`

type Customer struct {
    Id      int64 `json:"id"`
    Name    string `json:"name"`
    Age     int `json:"age"`
    Address *Address `json:"address"`

func main() {
    old1 := &Customer{Id:1, Name:"alpha", Age:5, Address:&Address{City:"Delhi"}}

    b := []byte(`{"name": "beta"}`) //no address, age specified picks from old
    up1 := new(Customer)
    json.Unmarshal(b, up1)
    if err := mergo.Merge(up1, old1); err != nil {
        fmt.Printf("err in 1st merge: %v\n", err)
    m1, _ := json.Marshal(up1)
    fmt.Printf("merged to: %v\n", string(m1))

    old2 := &Customer{Id:1, Name:"alpha", Age:5, Address:&Address{City:"Delhi"}}
    b2 := []byte(`{ "address": {"city": "mumbai"}}`) //address specified
    up2 := new(Customer)
    json.Unmarshal(b2, up2)
    if err := mergo.Merge(up2, old2); err != nil {
        fmt.Printf("err in 1st merge: %v\n", err)
    m2, _ := json.Marshal(up2)
    fmt.Printf("merged to: %v\n", string(m2))
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