Tcl

Iterate JSON where Member Names are Data Values

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Demonstrates how to parse JSON where member names are not keywords, but instead are data values. Tcl

load ./chilkat.dll

set success 0

set json [new_CkJsonObject]

set success [CkJsonObject_LoadFile $json "qa_data/json/valuesAsNames.json"]

# Imagine we have JSON such as the following:

# {
#   "1680": {
#     "entity_id": "1680",
#     "type_id": "simple",
#     "sku": "123"
#   },
#   "1701": {
#     "entity_id": "1701",
#     "type_id": "simple",
#     "sku": "456"
#   }
# }
# 

# This presents a parsing problem because the member names, such as "1680"
# are not keywords.  Instead they are data values.  We don't know what they
# may be in advance.  

# To solve, we iterate over the members, get the name of each, ...
set numMembers [CkJsonObject_get_Size $json]

for {set i 0} {$i <= [expr $numMembers - 1]} {incr i} {

    set name [CkJsonObject_nameAt $json $i]

    puts "$name:"
    # jRecord is a CkJsonObject
    set jRecord [CkJsonObject_ObjectAt $json $i]

    puts "entity_id: [CkJsonObject_stringOf $jRecord entity_id]"
    puts "type_id: [CkJsonObject_stringOf $jRecord type_id]"
    puts "sku: [CkJsonObject_stringOf $jRecord sku]"

    delete_CkJsonObject $jRecord

}

delete_CkJsonObject $json