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JSON.serialize: is it possible to suppress null values of a map?
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JSON.serialize: is it possible to suppress null values of a map?
The 2019 Stack Overflow Developer Survey Results Are InJSON.Serialize method not returning null fields (part deux)Apex JSON.serialize() with null values (RELOADED)Deserialize JSON to SObjectSerializes STRING into JSON FormatChanging map key valuesKeep null values in Remote JSON callError initializing mapJSON serialize SObject including fields with null valueschange key values of maphow to display picklist values which is stored in custom settings values based on the condition
.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty margin-bottom:0;
I tried to serialize a map with null value (api 45):
Map<String, String> bodyMap = new Map<String, String> 'key'=>'value', 'key2'=>null;
System.debug(JSON.serialize(bodyMap,true));
but it does not suppress null value (as it does in a custom object):
"key2":null,"key":"value"
Does it work as expected? Is there any other way than writing custom serialiser?
apex json null serialize
add a comment |
I tried to serialize a map with null value (api 45):
Map<String, String> bodyMap = new Map<String, String> 'key'=>'value', 'key2'=>null;
System.debug(JSON.serialize(bodyMap,true));
but it does not suppress null value (as it does in a custom object):
"key2":null,"key":"value"
Does it work as expected? Is there any other way than writing custom serialiser?
apex json null serialize
I don't believe that there is a way other than a custom serializer that you can use. Out the box JSON methods will take what they have an serialize it as is . With a custom serializer you will have the option of supplying a replacement for a null value.
– Ronnie
2 hours ago
This methodserialize(objectToSerialize, suppressApexObjectNulls)
seems to work specifically on ApexObject
types only and that the platform considers a Collection to be distinct from an Apex Object.
– Jayant Das
2 hours ago
@JayantDas True. Same behaviour with List.
– kvor
2 hours ago
@kvor Even though it does not clearly calls out, but going through few references it does establish this distinction, I have added details as answer, if that helps.
– Jayant Das
2 hours ago
add a comment |
I tried to serialize a map with null value (api 45):
Map<String, String> bodyMap = new Map<String, String> 'key'=>'value', 'key2'=>null;
System.debug(JSON.serialize(bodyMap,true));
but it does not suppress null value (as it does in a custom object):
"key2":null,"key":"value"
Does it work as expected? Is there any other way than writing custom serialiser?
apex json null serialize
I tried to serialize a map with null value (api 45):
Map<String, String> bodyMap = new Map<String, String> 'key'=>'value', 'key2'=>null;
System.debug(JSON.serialize(bodyMap,true));
but it does not suppress null value (as it does in a custom object):
"key2":null,"key":"value"
Does it work as expected? Is there any other way than writing custom serialiser?
apex json null serialize
apex json null serialize
asked 2 hours ago
kvorkvor
714
714
I don't believe that there is a way other than a custom serializer that you can use. Out the box JSON methods will take what they have an serialize it as is . With a custom serializer you will have the option of supplying a replacement for a null value.
– Ronnie
2 hours ago
This methodserialize(objectToSerialize, suppressApexObjectNulls)
seems to work specifically on ApexObject
types only and that the platform considers a Collection to be distinct from an Apex Object.
– Jayant Das
2 hours ago
@JayantDas True. Same behaviour with List.
– kvor
2 hours ago
@kvor Even though it does not clearly calls out, but going through few references it does establish this distinction, I have added details as answer, if that helps.
– Jayant Das
2 hours ago
add a comment |
I don't believe that there is a way other than a custom serializer that you can use. Out the box JSON methods will take what they have an serialize it as is . With a custom serializer you will have the option of supplying a replacement for a null value.
– Ronnie
2 hours ago
This methodserialize(objectToSerialize, suppressApexObjectNulls)
seems to work specifically on ApexObject
types only and that the platform considers a Collection to be distinct from an Apex Object.
– Jayant Das
2 hours ago
@JayantDas True. Same behaviour with List.
– kvor
2 hours ago
@kvor Even though it does not clearly calls out, but going through few references it does establish this distinction, I have added details as answer, if that helps.
– Jayant Das
2 hours ago
I don't believe that there is a way other than a custom serializer that you can use. Out the box JSON methods will take what they have an serialize it as is . With a custom serializer you will have the option of supplying a replacement for a null value.
– Ronnie
2 hours ago
I don't believe that there is a way other than a custom serializer that you can use. Out the box JSON methods will take what they have an serialize it as is . With a custom serializer you will have the option of supplying a replacement for a null value.
– Ronnie
2 hours ago
This method
serialize(objectToSerialize, suppressApexObjectNulls)
seems to work specifically on Apex Object
types only and that the platform considers a Collection to be distinct from an Apex Object.– Jayant Das
2 hours ago
This method
serialize(objectToSerialize, suppressApexObjectNulls)
seems to work specifically on Apex Object
types only and that the platform considers a Collection to be distinct from an Apex Object.– Jayant Das
2 hours ago
@JayantDas True. Same behaviour with List.
– kvor
2 hours ago
@JayantDas True. Same behaviour with List.
– kvor
2 hours ago
@kvor Even though it does not clearly calls out, but going through few references it does establish this distinction, I have added details as answer, if that helps.
– Jayant Das
2 hours ago
@kvor Even though it does not clearly calls out, but going through few references it does establish this distinction, I have added details as answer, if that helps.
– Jayant Das
2 hours ago
add a comment |
3 Answers
3
active
oldest
votes
Yep, that's the expected behavior.
For simple maps, you can get rid of null values by iterating over the map keys, keeping track of which ones have null values, and then a little map manipulation.
Set<String> mapKeysToRemoveSet = new Set<String>();
for(String key :myMap.keySet())
if(myMap.get(key) == null)
mapKeysToRemoveSet.add(key);
// The Map class only comes with a remove() method, which only removes one item from the
// map at a time.
// It's not a great idea to modify a collection while you're iterating over it.
// The solution is to get the map's keyset, then use the set class's removeAll() method.
// This has the effect of removing multiple items from the map in one shot.
myMap.keySet().removeAll(mapKeysToRemoveSet);
System.debug(JSON.serialize(myMap));
add a comment |
The documentation for JSON.serialize(objectToSerialize, suppressApexObjectNulls)
mentions the type of objectToSerialize
parameter as:
Type: Object
The Apex object to serialize.
And if you refer to other documentations (mentioned below), a Collection is always categorized differently than an Apex Object. Apex Object always refers to instances of custom/system classes within the platform.
So the behavior what you are experiencing is expected. Your option is to either go with a custom class or serialize only after removing the null
values from the collection.
References for data types in Apex which mentions Collection differently than Apex Objects:
- Data Types
- Expressions
add a comment |
This is a problem which I had faced, and I came across a string manipulation method that strips out nulls from null json keys.
public static string stripJsonNulls(string JsonString)
if(JsonString != null)
JsonString = JsonString.replaceAll('"[^"]*":null',''); //basic removeal of null values
JsonString = JsonString.replaceAll(',2,', ','); //remove duplicate/multiple commas
JsonString = JsonString.replace(',', ''); //prevent opening brace from having a comma after it
JsonString = JsonString.replace(',', ''); //prevent closing brace from having a comma before it
JsonString = JsonString.replace('[,', '['); //prevent opening bracket from having a comma after it
JsonString = JsonString.replace(',]', ']'); //prevent closing bracket from having a comma before it
return JsonString;
Map<String, String> bodyMap = new Map<String, String> 'key'=>'value', 'key2'=>null;
System.debug(stripJsonNulls(JSON.serialize(bodyMap,false)));
OP : "key":"value"
Src: https://iwritecrappycode.wordpress.com/2014/07/16/stripping-nulls-from-a-json-object-in-apex/
add a comment |
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3 Answers
3
active
oldest
votes
3 Answers
3
active
oldest
votes
active
oldest
votes
active
oldest
votes
Yep, that's the expected behavior.
For simple maps, you can get rid of null values by iterating over the map keys, keeping track of which ones have null values, and then a little map manipulation.
Set<String> mapKeysToRemoveSet = new Set<String>();
for(String key :myMap.keySet())
if(myMap.get(key) == null)
mapKeysToRemoveSet.add(key);
// The Map class only comes with a remove() method, which only removes one item from the
// map at a time.
// It's not a great idea to modify a collection while you're iterating over it.
// The solution is to get the map's keyset, then use the set class's removeAll() method.
// This has the effect of removing multiple items from the map in one shot.
myMap.keySet().removeAll(mapKeysToRemoveSet);
System.debug(JSON.serialize(myMap));
add a comment |
Yep, that's the expected behavior.
For simple maps, you can get rid of null values by iterating over the map keys, keeping track of which ones have null values, and then a little map manipulation.
Set<String> mapKeysToRemoveSet = new Set<String>();
for(String key :myMap.keySet())
if(myMap.get(key) == null)
mapKeysToRemoveSet.add(key);
// The Map class only comes with a remove() method, which only removes one item from the
// map at a time.
// It's not a great idea to modify a collection while you're iterating over it.
// The solution is to get the map's keyset, then use the set class's removeAll() method.
// This has the effect of removing multiple items from the map in one shot.
myMap.keySet().removeAll(mapKeysToRemoveSet);
System.debug(JSON.serialize(myMap));
add a comment |
Yep, that's the expected behavior.
For simple maps, you can get rid of null values by iterating over the map keys, keeping track of which ones have null values, and then a little map manipulation.
Set<String> mapKeysToRemoveSet = new Set<String>();
for(String key :myMap.keySet())
if(myMap.get(key) == null)
mapKeysToRemoveSet.add(key);
// The Map class only comes with a remove() method, which only removes one item from the
// map at a time.
// It's not a great idea to modify a collection while you're iterating over it.
// The solution is to get the map's keyset, then use the set class's removeAll() method.
// This has the effect of removing multiple items from the map in one shot.
myMap.keySet().removeAll(mapKeysToRemoveSet);
System.debug(JSON.serialize(myMap));
Yep, that's the expected behavior.
For simple maps, you can get rid of null values by iterating over the map keys, keeping track of which ones have null values, and then a little map manipulation.
Set<String> mapKeysToRemoveSet = new Set<String>();
for(String key :myMap.keySet())
if(myMap.get(key) == null)
mapKeysToRemoveSet.add(key);
// The Map class only comes with a remove() method, which only removes one item from the
// map at a time.
// It's not a great idea to modify a collection while you're iterating over it.
// The solution is to get the map's keyset, then use the set class's removeAll() method.
// This has the effect of removing multiple items from the map in one shot.
myMap.keySet().removeAll(mapKeysToRemoveSet);
System.debug(JSON.serialize(myMap));
answered 2 hours ago
Derek FDerek F
20.9k52353
20.9k52353
add a comment |
add a comment |
The documentation for JSON.serialize(objectToSerialize, suppressApexObjectNulls)
mentions the type of objectToSerialize
parameter as:
Type: Object
The Apex object to serialize.
And if you refer to other documentations (mentioned below), a Collection is always categorized differently than an Apex Object. Apex Object always refers to instances of custom/system classes within the platform.
So the behavior what you are experiencing is expected. Your option is to either go with a custom class or serialize only after removing the null
values from the collection.
References for data types in Apex which mentions Collection differently than Apex Objects:
- Data Types
- Expressions
add a comment |
The documentation for JSON.serialize(objectToSerialize, suppressApexObjectNulls)
mentions the type of objectToSerialize
parameter as:
Type: Object
The Apex object to serialize.
And if you refer to other documentations (mentioned below), a Collection is always categorized differently than an Apex Object. Apex Object always refers to instances of custom/system classes within the platform.
So the behavior what you are experiencing is expected. Your option is to either go with a custom class or serialize only after removing the null
values from the collection.
References for data types in Apex which mentions Collection differently than Apex Objects:
- Data Types
- Expressions
add a comment |
The documentation for JSON.serialize(objectToSerialize, suppressApexObjectNulls)
mentions the type of objectToSerialize
parameter as:
Type: Object
The Apex object to serialize.
And if you refer to other documentations (mentioned below), a Collection is always categorized differently than an Apex Object. Apex Object always refers to instances of custom/system classes within the platform.
So the behavior what you are experiencing is expected. Your option is to either go with a custom class or serialize only after removing the null
values from the collection.
References for data types in Apex which mentions Collection differently than Apex Objects:
- Data Types
- Expressions
The documentation for JSON.serialize(objectToSerialize, suppressApexObjectNulls)
mentions the type of objectToSerialize
parameter as:
Type: Object
The Apex object to serialize.
And if you refer to other documentations (mentioned below), a Collection is always categorized differently than an Apex Object. Apex Object always refers to instances of custom/system classes within the platform.
So the behavior what you are experiencing is expected. Your option is to either go with a custom class or serialize only after removing the null
values from the collection.
References for data types in Apex which mentions Collection differently than Apex Objects:
- Data Types
- Expressions
answered 2 hours ago
Jayant DasJayant Das
18.1k21330
18.1k21330
add a comment |
add a comment |
This is a problem which I had faced, and I came across a string manipulation method that strips out nulls from null json keys.
public static string stripJsonNulls(string JsonString)
if(JsonString != null)
JsonString = JsonString.replaceAll('"[^"]*":null',''); //basic removeal of null values
JsonString = JsonString.replaceAll(',2,', ','); //remove duplicate/multiple commas
JsonString = JsonString.replace(',', ''); //prevent opening brace from having a comma after it
JsonString = JsonString.replace(',', ''); //prevent closing brace from having a comma before it
JsonString = JsonString.replace('[,', '['); //prevent opening bracket from having a comma after it
JsonString = JsonString.replace(',]', ']'); //prevent closing bracket from having a comma before it
return JsonString;
Map<String, String> bodyMap = new Map<String, String> 'key'=>'value', 'key2'=>null;
System.debug(stripJsonNulls(JSON.serialize(bodyMap,false)));
OP : "key":"value"
Src: https://iwritecrappycode.wordpress.com/2014/07/16/stripping-nulls-from-a-json-object-in-apex/
add a comment |
This is a problem which I had faced, and I came across a string manipulation method that strips out nulls from null json keys.
public static string stripJsonNulls(string JsonString)
if(JsonString != null)
JsonString = JsonString.replaceAll('"[^"]*":null',''); //basic removeal of null values
JsonString = JsonString.replaceAll(',2,', ','); //remove duplicate/multiple commas
JsonString = JsonString.replace(',', ''); //prevent opening brace from having a comma after it
JsonString = JsonString.replace(',', ''); //prevent closing brace from having a comma before it
JsonString = JsonString.replace('[,', '['); //prevent opening bracket from having a comma after it
JsonString = JsonString.replace(',]', ']'); //prevent closing bracket from having a comma before it
return JsonString;
Map<String, String> bodyMap = new Map<String, String> 'key'=>'value', 'key2'=>null;
System.debug(stripJsonNulls(JSON.serialize(bodyMap,false)));
OP : "key":"value"
Src: https://iwritecrappycode.wordpress.com/2014/07/16/stripping-nulls-from-a-json-object-in-apex/
add a comment |
This is a problem which I had faced, and I came across a string manipulation method that strips out nulls from null json keys.
public static string stripJsonNulls(string JsonString)
if(JsonString != null)
JsonString = JsonString.replaceAll('"[^"]*":null',''); //basic removeal of null values
JsonString = JsonString.replaceAll(',2,', ','); //remove duplicate/multiple commas
JsonString = JsonString.replace(',', ''); //prevent opening brace from having a comma after it
JsonString = JsonString.replace(',', ''); //prevent closing brace from having a comma before it
JsonString = JsonString.replace('[,', '['); //prevent opening bracket from having a comma after it
JsonString = JsonString.replace(',]', ']'); //prevent closing bracket from having a comma before it
return JsonString;
Map<String, String> bodyMap = new Map<String, String> 'key'=>'value', 'key2'=>null;
System.debug(stripJsonNulls(JSON.serialize(bodyMap,false)));
OP : "key":"value"
Src: https://iwritecrappycode.wordpress.com/2014/07/16/stripping-nulls-from-a-json-object-in-apex/
This is a problem which I had faced, and I came across a string manipulation method that strips out nulls from null json keys.
public static string stripJsonNulls(string JsonString)
if(JsonString != null)
JsonString = JsonString.replaceAll('"[^"]*":null',''); //basic removeal of null values
JsonString = JsonString.replaceAll(',2,', ','); //remove duplicate/multiple commas
JsonString = JsonString.replace(',', ''); //prevent opening brace from having a comma after it
JsonString = JsonString.replace(',', ''); //prevent closing brace from having a comma before it
JsonString = JsonString.replace('[,', '['); //prevent opening bracket from having a comma after it
JsonString = JsonString.replace(',]', ']'); //prevent closing bracket from having a comma before it
return JsonString;
Map<String, String> bodyMap = new Map<String, String> 'key'=>'value', 'key2'=>null;
System.debug(stripJsonNulls(JSON.serialize(bodyMap,false)));
OP : "key":"value"
Src: https://iwritecrappycode.wordpress.com/2014/07/16/stripping-nulls-from-a-json-object-in-apex/
answered 2 hours ago
Pranay JaiswalPranay Jaiswal
18.6k53158
18.6k53158
add a comment |
add a comment |
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I don't believe that there is a way other than a custom serializer that you can use. Out the box JSON methods will take what they have an serialize it as is . With a custom serializer you will have the option of supplying a replacement for a null value.
– Ronnie
2 hours ago
This method
serialize(objectToSerialize, suppressApexObjectNulls)
seems to work specifically on ApexObject
types only and that the platform considers a Collection to be distinct from an Apex Object.– Jayant Das
2 hours ago
@JayantDas True. Same behaviour with List.
– kvor
2 hours ago
@kvor Even though it does not clearly calls out, but going through few references it does establish this distinction, I have added details as answer, if that helps.
– Jayant Das
2 hours ago