JSON: Difference between revisions
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The pairs are separated from each other with commas: <font color="blue">"name1":''value1'', "name2":''value2'', "name3":''value3''...</font> (the last pair in such a series should <u>not</u> be followed by a comma however). | The pairs are separated from each other with commas: <font color="blue">"name1":''value1'', "name2":''value2'', "name3":''value3''...</font> (the last pair in such a series should <u>not</u> be followed by a comma however). | ||
Special | Special characters may be "escaped" in string values (or indeed names) with a backslash: <font color="blue">'''\'''</font> | ||
*'''\\''' represents '''<font color="blue">\'''</font> (backslash) | *'''\\''' represents '''<font color="blue">\'''</font> (backslash) | ||
*'''\/''' represents '''<font color="blue">/'''</font> (forward slash) | *'''\/''' represents '''<font color="blue">/'''</font> (forward slash) | ||
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When migrating data from JSON to a struct sometimes a member might be missing from the JSON data. For example because the element you are looking for is empty. In that case the runtime will trigger a runtime error. You can disable that by setting the [https://docs.dataaccess.com/dataflexhelp/mergedProjects/VDFClassRef/cJsonObject-Property-pbRequireAllMembers.htm pbRequireAllMembers] property of the DataFlex Json object to false. | When migrating data from JSON to a struct sometimes a member might be missing from the JSON data. For example because the element you are looking for is empty. In that case the runtime will trigger a runtime error. You can disable that by setting the [https://docs.dataaccess.com/dataflexhelp/mergedProjects/VDFClassRef/cJsonObject-Property-pbRequireAllMembers.htm pbRequireAllMembers] property of the DataFlex Json object to false. | ||
If you need to deal with JSON which uses DataFlex reserved words (or other invalid values) | If you need to deal with JSON which uses DataFlex reserved words in its member names (or other invalid values, such as those containing spaces in the example above: e.g "first name") then, since DataFlex 19.1, you can now use a valid name in your struct and assign a different name for the conversion via meta-data tags. This is sometimes referred to as the [https://docs.dataaccess.com/dataflexhelp/mergedProjects/Tools/Name_Meta-Data_Tag.htm altName member] | ||
== External references == | == External references == | ||