Nested Struct Golang

We declared the Nested type struct which we. for is the only loop available in Go. Analysis ¶ This is an incredibly common task I'm sure any programmer with a sufficiently long career has encountered in one shape or form. Introduction. Although it would be possible for us to write programs only using Go's built-in data types, at some point it would become quite tedious. In this article, we'll learn how to use Golang's built-in map type. Regex to extract image name from HTML in Golang Golang Programs At golangprograms. Suppose you want to keep track of your. The variables are used to store some data at a particular memory address in the system. You can access individual fields with dot notation. How do you get the memory address of a variable? How do you assign a value to a pointer? How do you create a new pointer? What is the value of x after running this program:. Part 26: Structs Instead of Classes - OOP in Go 21 August 2017. You can nest a slice, map or other struct inside your struct and the JSON will recursively parse everything correctly. We can make it easy to modify tags with an automated tool that is written for this sole purpose. Structures in Golang A structure or struct in Golang is a user-defined type which allows to group/combine items of possibly different types into a single type. GitHub Gist: instantly share code, notes, and snippets. (Both calls to pow return their results before the call to fmt. Again we can't specify the specific struct every time, as the user can create their own structs and we can't pass it. In practical Go programming, almost all data types are built/usedPixelstech, this page is to provide vistors information of the most updated technology information around the world. Since we don’t have classes in Go, you can say struct will do a job to make objects. The easiest way is through MarshalIndent function in Go standard encoding/json package. If the program contains tests or examples and no main function, the service runs the tests. Struct can be nested by creating a Struct type using other Struct types as the type for the fields of Struct. Go provides a built-in map type. < 2/27 > 2/27 > structs. Structs are incredibly extensible due to the fact we can create nested structs within our structs. This guide describes how to use the protocol buffer language to structure your protocol buffer data, including. 欢迎各位 Gophers !在本教程中,我们将探索如何使用 Go 和 GraphQL 服务进行交互。在本教程完结之时,我们希望你可以了解到以下内容: GraphQL 的基础知识 使用 Go 构建一个简易的 GraphQL 服务 基于 GraphQL 执行一些基本的查询 在本篇教程中,我们会专注于 GraphQL. But typically nil is used, which means an empty struct is used by default. If you use adoptWithCaveats to adopt an orphaned struct into a struct list, then a shallow copy is necessary, since the struct list requires that its elements are sequential in memory. Kita sepakati dalam buku ini, variabel tersebut dipanggil dengan istilah object atau object struct. Anonymous struct fields are usually marshaled as if their inner exported fields were fields in the outer struct, subject to the usual Go visibility rules amended as described in the next paragraph. It works in concert with the Go source code generated for. It returns a pointer to the newly created struct. Hence, You entered -2 is displayed on the screen. Lets say we have a collection called 'users' that contains the data of our users, and in each user document there is a nested array that keeps track of the login attempts, the document of user 'John' looks like this:. Arrays in Golang are value types unlike other languages like C, C++, and Java where arrays are reference types. Check Exists in Slice of Structures in Golang 57. The intent of this article is to shed light on something that, as a newcomer to Golang and a programmer falling somewhere between beginner and intermediate in general, I found very confusing. Nested JSON in GOLang. Golang Struct - Jun 01, 2019. To define a new struct type, you list the names and types of each field. Struct values encode as JSON objects. Go supports nested struct inside function but no nested function except lambda, does it mean there is no way to. Struct fields are accessed using a dot. Welcome to tutorial number 9 in Golang tutorial series. For more information on JSON, visit www. They can be accessed via the dot operator (. Composing a Nested Elasticsearch Query in Golang Sun, Jul 24, 2016 TL;DR: A well-composed elasticsearch query is a beautiful thing, but it's easy to get lost on the way there. When writing Go code, it often feels like a (slightly verbose) scripting language, but has nice type-safety and good performance. Sum in Slice of Structures in Golang 55. Anonymous struct fields are usually marshaled as if their inner exported fields were fields in the outer struct, subject to the usual Go visibility rules amended as described in the next paragraph. Variables declared inside an if short statement are also available inside any of the else blocks. An array has a fixed size. In GoLang, we can format and produce string using fmt. July 11, 2016 Inside this Golang file we want to add the following code. Golang switch between structs. v9 package in Golang to validate native Go data structures, their fields, and any variables that don’t quite fit in. Any real-world entity which has some set of properties or fields can be represented as a struct. In some scenarios, it is ok to use array pointers as arrays. for printing, you can define the String method on real type of structure (it won't be portable, as it depends the real type name of the C struct, but it's certainly doable, and will save. org's servers. We can make it easy to modify tags with an automated tool that is written for this sole purpose. July 11, 2016 Inside this Golang file we want to add the following code. unmarshal nested json without knowing structure Tag: go I am using a key value store as the backend for my golang application, with the date serving as the key (to keep entries sorted) and json documents as the values. Go's Declaration Syntax. But please pay attentPixelstech, this page is to provide vistors information of the most updated technology information around the world. Create A Simple RESTful API With Golang. Nested templates can be used for parts of code frequently used across templates, a footer or header for example. The new keyword can be used to create a new struct. Struct Literals. How do you get the memory address of a variable? How do you assign a value to a pointer? How do you create a new pointer? What is the value of x after running this program:. < 2/27 > 2/27 > structs. In your example you are trying to pass the struct itself to the function rather than an instance of the struct. It's kept short for brevity: the actual document contained many more items in each of the nested lists (so multiple groups, categories, and points), but this snippet covers the overall structure. If the program contains tests or examples and no main function, the service runs the tests. golang 嵌套struct 如何直接初始化? 如下 type Account struct { Id uint32 Name string Nested struct { Age uint8 } } 如何直接初始化(非 对象. import "fmt" 4 5. Single struct or multiple for nested JSON?-3. Golang : How to unmarshal JSON inner/nested value and assign to specific struct? golang inner-JSON unmarshal struct Another tutorial to be recorded here after helping a newbie to Golang. An array has a fixed size. Anonymous Structure and Field in Golang A structure or struct in Golang is a user-defined type, which allows us to create a group of elements of different types into a single unit. Structs are basically Golang's version of what in, for instance, Java, would be classes This is a bit oversimplified, and really just meant to get you an idea to get you started. of type, struct date. iam getting the User structure values, but could not get the communication structure values. The above Employee struct is called a named structure because it creates a new type named Employee which can be used to create structures of type Employee. We use this concept in the nested structure where a structure is a field in another structure, simply by just adding the name of the structure into another structure and it behaves like the Anonymous Field to the nested structure. (2 replies) Something like type A struct { Root string const Name string } Where Root is a constant for this struct which never changes. * If the struct has a field of type []byte or string with tag ",innerxml", Unmarshal accumulates the raw XML nested inside the element in that field. Anonymous struct fields are usually marshaled as if their inner exported fields were fields in the outer struct, subject to the usual Go visibility rules amended as described in the next paragraph. (Both calls to pow return their results before the call to fmt. It can also handle Cross-Field and Cross-Struct validation for nested structs and has the ability to dive into arrays and maps of any type. Now I have the utility of getting all files, getting content of the file and making an index. [Golang] XML Parsing Example (1) type div struct The output result will be the same because the raw XML nested inside the div element is the same. epoll 的实现比poll/select 复杂一些,这是因为: 1. An important part of high quality software is code reuse - embodied in the principle "Don't Repeat Yourself. They are useful when you want to group your data to form the records. Nested templates can be used for parts of code frequently used across templates, a footer or header for example. Is there a way to unmarshal the nested bar property and assign it directly to a struct property without creating a nested struct? No, encoding/json cannot do the trick with ">some>deep>childnode" like encoding/xml can do. That is a field of the struct literal (the struct type is an anonymous struct), and the general rule is that fields are indented more than the literal itself, i. Slices are analogous to arrays in other languages, but have some unusual properties. This structure can also be made more compact by declaring fields that belong to a same type in a single line followed by the type name. But typically nil is used, which means an empty struct is used by default. Kita sepakati dalam buku ini, variabel tersebut dipanggil dengan istilah object atau object struct. In practice, slices are much more common than arrays. If goroutine and channel are considered as the foundation for GoLang concurrency, interface would be the key for data types in GoLang. It can be used in the places where it makes sense to group a data into the single unit rather than maintaining each of them as the separate types. iam getting the User structure values, but could not get the communication structure values. The if statement is easy. Structs are typed collections that are used to stored fields. I can't use this in practice, since I am using the same structs as gorm models, and it requires the nested structs be named in order to migrate the database. Golang: Convert JSON to struct. You can list just a subset of fields by using the Name: syntax. Go by Example is a hands-on introduction to Go using annotated example programs. It can also handle Cross-Field and Cross-Struct validation for nested structs and has the ability to dive into arrays and maps of any type. In GoLang, we can format and produce string using fmt. A struct is a user-defined type that contains the collection of named fields/properties. import "fmt" 4 5. Anonymous struct fields are usually marshaled as if their inner exported fields were fields in the outer struct, subject to the usual Go visibility rules amended as described in the next paragraph. The Go structure can be arbitrarily complex, containing slices, other structs, etc. Nested structures in golang: nested_struct. Rob Pike 7 July 2010 Introduction. Newcomers to Go wonder why the declaration syntax is different from the tradition established in the C family. In some scenarios, it is ok to use array pointers as arrays. Have you ever built an application and decided that you didn’t want to hardcode a bunch of values that might change frequently? The answer is, probably yes. Nested micro 1. Printf(), just like C, GoLang also supports format verbs like %s, %d which can be placeholder for different types of values. Anonymous Structure. CODE EXAMPLE The append function appends elements to the end of a slice: if there is enough capacity, the underlying array is reused; if not, a new underlying array is allocated and the data is copied over. Stay clear-headed from the top down and you should be fine. Konsep struct di golang mirip dengan konsep class pada OOP, meski sebenarnya berbeda. It is an amazing little lanaguage with cool syntax, a huge community, and it’s a nice break from interpreted languages like Python and Ruby. Colors: []struct{Name, Title string}{} is what you are looking for. The new keyword can be used to create a new struct. JSON is a lightweight data-interchange format. Kita sepakati dalam buku ini, variabel tersebut dipanggil dengan istilah object atau object struct. As we saw from structs lesson that if the nested field is anonymous struct then its fields will be accessible from parent struct. encoding/gob and encoding/json do, among others. After combining the two, we can decode it into our custom data structure and print it out. Marshal? It's easier to demonstrate on example. Promoted Methods in Golang Structure In Go structure , the working of promoted methods is just like Promoted Fields. Lets say we have a collection called 'users' that contains the data of our users, and in each user document there is a nested array that keeps track of the login attempts, the document of user 'John' looks like this:. of type, struct date. Structs and Interfaces. A summary of the properties of the protocol buffer interface for a protocol buffer variable v:. In some cases, there might be some JavaScript code needs to be ran in a GoLang project. Before we start validating data, let’s come up with a simple scenario that might be realistic. Parsing JSON Responses In Golang. I agree with the comments above though, this would be much better handled by making sure each struct satisfies the fmt. This article will look at what slices are and how they are used. GitHub Gist: instantly share code, notes, and snippets. v9 package in Golang to validate native Go data structures, their fields, and any variables that don’t quite fit in. In this blog post, we discuss how to use structs in Golang. By default, the BigQuery service expects all source data to be UTF-8 encoded. Nested fields refers to structs which are properties of other structs. Many hash table implementations exist with varying properties, but in general they offer fast lookups, adds, and deletes. Sum in Slice of Structures in Golang 55. Please consider supporting us by disabling your ad blocker on our website. We declared the Nested type struct which we. Online tool to convert your CSV or TSV formatted data to JSON. In the rst few chapters of the book, the author will review some basic knowledge about Go. We’re going to see how to use the validator. proto files by the protocol compiler. If your struct's property is the same in the JSON you should be able to skip the annotation. You can list just a subset of fields by using the Name: syntax. }}, which represents the pipeline and root element of the data. 2 ways to create and initialize a new struct. Let's see what this is about! Basically, instead of declaring 3 Config, Server and. When I ran your code it wouldn't compile. The idea comes when I was creating unit testing in every function I have, and making different. % godoc -src sync Mutex // A Mutex is a mutual exclusion lock. The default key string is the struct field name but can be changed in the struct field's tag value. It covers the proto3 version of the protocol buffers language: for information on the older proto2 syntax, see the Proto2 Language Guide. It's kept short for brevity: the actual document contained many more items in each of the nested lists (so multiple groups, categories, and points), but this snippet covers the overall structure. Have you ever built an application and decided that you didn’t want to hardcode a bunch of values that might change frequently? The answer is, probably yes. // Mutexes can be created as part of other structures; // the zero value for a Mutex is an unlocked mutex. That is a field of the struct literal (the struct type is an anonymous struct), and the general rule is that fields are indented more than the literal itself, i. A struct in the C programming language (and many derivatives) is a composite data type (or record) declaration that defines a physically grouped list of variables under one name in a block of memory, allowing the different variables to be accessed via a single pointer or by the struct declared name which returns the same address. To access the field X of a struct when we have the struct pointer p we could write (*p). Name}}, my Task structure has a Title and a Content, (please note the capital T and C, they are exported names and they need to be capitalised unless you want to make. The Go Playground is a web service that runs on golang. %v the value in a default format when printi A strange behavior of printing struct with nested struct in GoLang | Pixelstech. Go supports nested struct inside function but no nested function except lambda, does it mean there is no way to. A structure or struct in Golang is a user-defined type, which allows us to create a group of elements of different types into a single unit. how to create an angular application and configure the route URLs. Swagger Editor. Tag: go,nested. Golang kimnguyet0815 September 30, 2019, 3:43pm #1 There are a few questions on the topic but none of them seem to cover my case, thus I'm creating a new one. package main. Nesting one struct within another can be a useful way to model more complex structures. The new keyword can be used to create a new struct. A linked list is a type of data structure that looks like this: Each node of the list contains a value (1, 2, or 3 in this case) and a pointer to the next node. Package mapstructure exposes functionality to convert an arbitrary map[string]interface{} into a native Go structure. BigQuery supports UTF-8 encoding for both nested or repeated and flat data. And since I can have many files I need to have a array of said struct. Nested Struct Type Struct can be nested by creating a Struct type using other Struct types as the type for the fields of Struct. Notice that only for slices of structs the slice index is required. It's born from typical need while developing Go application or utility. Again we can't specify the specific struct every time, as the user can create their own structs and we can't pass it. Struct can be nested by creating a Struct type using other Struct types as the type for the fields of Struct. a C struct that has other structs inside of it (anonymous structs) it is as if cgo stops parsing the struct past that first nested struct. Architecture for a Golang Web App. (And the order of named fields is irrelevant. Go-spew implements a deep pretty printer for Go data structures to aid in debugging. Anything past the first. load(jsonstring). import "fmt" func main. Go-spew implements a deep pretty printer for Go data structures to aid in debugging. Andrew Gerrand 25 January 2011 Introduction. Syntactically it resembles the objects and lists of JavaScript. golang - Unmarshal nested Json. GitHub Gist: instantly share code, notes, and snippets. The Go structure can be arbitrarily complex, containing slices, other structs, etc. html": { "href": "api/Microsoft. its defining curlies: 0a and the one on line 4. If you have a field which can be anything, you can always use the interface{} type. Go is an open source programming language designed for building simple, fast, and reliable software. When a structure definition has an object of another structure, it is known as Nested Structure. Golang program that uses slice of structs, pointer types package main import "fmt" type Location struct { x, y int valid bool } func main() {// Create empty slice of struct pointers. Control statements and Functions Control statements if. It contains a majority of the common features avialble to users/content editors, but may not have complete coverage of the featureset. Can could define a template as follows:. It is easy for humans to read and write and for machines to parse and generate. Golang: json. Zac Gross - zacg. The structure variables can be a normal structure variable or a pointer variable to access the data. TL;DR: We want to encode and decode nested arbitrary structs. Tx is an interface instead of a struct to enable connection pools to be implemented without relying on internal pgx state, to support psuedo-nested transactions with savepoints, and to allow tests to mock transactions. encoding/gob and encoding/json do, among others. Python, F#, Golang and Friends TJW* @ COSCUP 2013 2013-08-04 TJW* @ COSCUP 2013 Python, F#, Golang and Friends 2013-08-04 1 / 50 Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. go Syntax Imports. As for the "" on line 3, again that seems consistent to me. Nesting one struct within another can be a useful way to model more complex structures. But please pay attentPixelstech, this page is to provide vistors information of the most updated technology information around the world. Parsing XML Files With Golang. If you’ve been keeping up, I’ve been doing a lot of development with the Go programming language which is why I think it would be a great idea to go over XML in Golang. > "golang-nuts" group. Since this is a doubly-linked list each node will also have pointers to the previous node. They are useful when you want to group your data to form the records. How do you get the memory address of a variable? How do you assign a value to a pointer? How do you create a new pointer? What is the value of x after running this program:. Go supports nested struct inside function but no nested function except lambda, does it mean there is no way to. Initialize a variable in the struct definition with a value. Using Anonymous Structs to pass data to templates in GoLang One thing that is quite common with Python web frameworks like Django, Flask or Bottle is passing multiple objects to a view. As for the "" on line 3, again that seems consistent to me. We will create arrays with multiple sets of data and also look into the ways to create nested structure in JSON. JSON is one of the most popular serialization formats. The definition of a method attached to or associated with a struct or any other type for that matter, is quite similar to a normal func definition, the only difference being that you need to additionally specify the type. Getting Help] (4) "This is a "quick" how-to guide for using Discourse forum/community software. Using the previous example of the nested struct, we removed salary field name and just used Salary struct type to create anonymous fields. go Syntax Imports. Structs contains various utilities to work with Go (Golang) structs. A method is just a function with a special receiver type between the func keyword and the method name. Golang nested class inside function. The one disadvantage of storing json object which represents the entire nested golang struct: it's difficult to make queries/aggregations within. declares a variable a as an array of ten integers. Similarly for struct literals in general. Golang library for easier way to handle the nested data structure golang-github-kolo-xmlrpc-dev_0+git20150413. 26 in Golang tutorial series. Marshal? It's easier to demonstrate on example. The Go Playground is a web service that runs on golang. -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. org's servers. Please read nested composite literals can be simplified for details. You can learn below concepts in this section. Model Username string Orders Order} type Order struct { gorm. It is an amazing little lanaguage with cool syntax, a huge community, and it’s a nice break from interpreted languages like Python and Ruby. Cloud Firestore is a flexible, scalable database for mobile, web, and server development from Firebase and Google Cloud Platform. Stay clear-headed from the top down and you should be fine. Golang program that uses slice of structs, pointer types package main import "fmt" type Location struct { x, y int valid bool } func main() {// Create empty slice of struct pointers. Many hash table implementations exist with varying properties, but in general they offer fast lookups, adds, and deletes. Have you ever built an application and decided that you didn’t want to hardcode a bunch of values that might change frequently? The answer is, probably yes. > "golang-nuts" group. More than 1 year has passed since last update. It didn’t take long, but I found myself struggling to do things that struck me as being pretty basic. It is possible to declare structures without declaring a new type and these type of structures are called anonymous structures. 6 and mgo 2. 1, MongoDB 3. Arrays in Golang are value types. Go, often referred to as Golang, is an open source programming language created at Google in 2009 by Robert Griesemer, Rob Pike. This post is one path. Let’s see what this is about! Basically, instead of declaring 3 Config, Server and. Structs are basically Golang's version of what in, for instance, Java, would be classes This is a bit oversimplified, and really just meant to get you an idea to get you started. Suppose you want to keep track of your. this is a nested structure that is not too. If the struct pointed to contains other structs, then the nested or embedded structs are flattened. Golang : How to unmarshal JSON inner/nested value and assign to specific struct? golang inner-JSON unmarshal struct Another tutorial to be recorded here after helping a newbie to Golang. For example, given these definitions: type Inner1 struct { W int32 X string } type Inner2 struct { Y float64 } type Inner3 struct { Z bool } type Outer struct { A int16 I []Inner1 J Inner2 Inner3 }. Each data field in a struct is declared with a known type, which could be a built-in type or another user-defined type. Dot Net Perls has example pages for many languages, with explanations and code side by side (for easy understanding). A few a months ago, I was creating a simple library in golang, to help golang engineers when testing their function. A struct in the C programming language (and many derivatives) is a composite data type (or record) declaration that defines a physically grouped list of variables under one name in a block of memory, allowing the different variables to be accessed via a single pointer or by the struct declared name which returns the same address. A loop statement is used to execute a block of code repeatedly. structs can also contain behavior in the form of methods. It contains a majority of the common features avialble to users/content editors, but may not have complete coverage of the featureset. Nesting one struct within another can be a useful way to model more complex structures. Disini penulis menggunakan konsep OOP sebagai analogi. Pointers are rarely used with Go's built-in types, but as we will see in the next chapter, they are extremely useful when paired with structs. golang - Unmarshal nested Json. What are generics? Why are they considered useful? Why does Go have no generics? What shall Gophers use instead? This article examines the nature of generics, and surveys various techniques that can be used to work around the absence of this programming paradigm. With time I've added other utilities for structs. But there are some nooks. Go supports nested struct inside function but no nested function except lambda, does it mean there is no way to. 224 Id int // the type id of the field, which must be already defined 225 } 226 type mapType struct { 227 CommonType 228 Key typeId 229 Elem typeId 230 } 231 type gobEncoderType struct { 232 CommonType 233 } 234 235 If there are nested type ids, the types for all inner type ids must be defined 236 before the top-level type id is used to. < 2/27 > 2/27 > structs. places := []*Location {} // Create struct and append it to the slice. (And the order of named fields is irrelevant. Stanford's course on programming language theory and design. You haven't declared a variable of type "record", you've declared a datatype called "record". Package mapstructure exposes functionality to convert an arbitrary map[string]interface{} into a native Go structure. Since this is a doubly-linked list each node will also have pointers to the previous node. Structs are typed collections that are used to stored fields. July 11, 2016 Inside this Golang file we want to add the following code. Is Go Object Oriented? Go is not a pure object oriented programming language. They are useful when you want to group your data to form the records. Initialize structs with default values. We can make it easy to modify tags with an automated tool that is written for this sole purpose. Sometimes, you might not have knowledge of the structure of the JSON string that you are reading. Nested Structures in Golang 61. They're useful for grouping data together to form records. A structure is a user-defined type which represents the collection of fields. html": { "href": "api/Microsoft. golang 嵌套struct 如何直接初始化? 如下 type Account struct { Id uint32 Name string Nested struct { Age uint8 } } 如何直接初始化(非 对象. It returns a pointer to the newly created struct. Getting Help] (4) "This is a "quick" how-to guide for using Discourse forum/community software. golang print nested struct (2) I'm still in the learning process of Go but am hitting a wall when it comes to JSON response arrays. Introduction. Tags Append Slice to Slice in Golang Array in Golang Arrays in Golang Calculate Dates in Golang Check Exists in Slice of Structures in Golang Compare Strings in Golang Concatenation in Golang Contains in Golang Convert String to Lowercase and Uppercase in Golang Count Array Elements in Golang Count in Slice of Structures in Golang Create Custom. Gyepi SAM encoding/binary doesn't encode structs. A struct is a collection of fields. The one disadvantage of storing json object which represents the entire nested golang struct: it's difficult to make queries/aggregations within. The service receives a Go program, vets , compiles, links, and runs the program inside a sandbox, then returns the output. Writing templates in Go is straight forward. Pretty print variable (struct, map, array, slice) in Go. com you can learn the essentials of Go from the basic to advanced topics, along with various examples and solutions. Nesting Templates. Paste a JSON structure on the left and the equivalent Go type will be generated to the right, which you can paste into your program. Again we can't specify the specific struct every time, as the user can create their own structs and we can't pass it. To access the field X of a struct when we have the struct pointer p we could write (*p). C Language Nested Structure with Example: in this tutorial we will learn about the Nested Structure, how nested structure initialized and how they can be accessed in C languages? This chapter contains example on Nested Structure. An important part of high quality software is code reuse - embodied in the principle "Don't Repeat Yourself. 一个信号量本质是一个整数值,它和一堆函数联合使用,这一对函数通常称为P和V;希望进入临界区的进程将在相关信号量上调用P;如果信号量的值大于零,则该值会减少1,进程可以继续执行;相反,如果信号量的值为0或者更小,则进程必须等待知道其他人释放该信号量;对信号量的解锁通过调用V. // Mutexes can be created as part of other structures; // the zero value for a Mutex is an unlocked mutex. Is Go Object Oriented? Go is not a pure object oriented programming language. CODE EXAMPLE The append function appends elements to the end of a slice: if there is enough capacity, the underlying array is reused; if not, a new underlying array is allocated and the data is copied over. The type [n]T is an array of n values of type T. That is a field of the struct literal (the struct type is an anonymous struct), and the general rule is that fields are indented more than the literal itself, i. Go maps in action. iam getting the User structure values, but could not get the communication structure values. This custom data structure also has a nested structure. Stdout or even HTTP response bodies. I can't use this in practice, since I am using the same structs as gorm models, and it requires the nested structs be named in order to migrate the database.