System.InvalidOperationException when trying use binding name as parameter in an azure function
follow this tutorial chain-azure-functions-data-using-bindings,
when using JavaScript it works, however created a new function app with .net as run time stack, added required cosmos db mappings, when sending GET request with query param like
https://azurefuncurl?code=abc&id=docs
appinsights reveals azure function/host wont start because of System.InvalidOperationException
tried going through official documentation: azure-functions/configInput-Usage, no luck
function.json
{
"bindings": [
{
"authLevel": "function",
"name": "req",
"type": "httpTrigger",
"direction": "in",
"methods": [
"get",
"post"
]
},
{
"name": "$return",
"type": "http",
"direction": "out"
},
{
"type": "cosmosDB",
"name": "bookmark",
"databaseName": "func-io-learn-db",
"collectionName": "Bookmarks",
"connectionStringSetting": "chainazurefunctions_DOCUMENTDB",
"id": "{id}",
"partitionKey": "{id}",
"direction": "in"
}]
}
run.csx
#r "Newtonsoft.Json"
using System.Net;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Primitives;
using Newtonsoft.Json;
public static async Task<IActionResult> Run(HttpRequest req, ILogger log, dynamic bookmark)
{
log.LogInformation("C# HTTP trigger function processed a request.");
string name = req.Query["id"];
string requestBody = await new StreamReader(req.Body).ReadToEndAsync();
dynamic data = JsonConvert.DeserializeObject(requestBody);
name = name ?? data?.name;
return name != null
? (ActionResult)new OkObjectResult($"Hello, {name}")
: new BadRequestObjectResult("Please pass a name on the query string or in the request body");
}
exception message:
Error indexing method 'Functions.find-bookmark' Unable to resolve binding parameter 'id'. Binding expressions must map to either a value provided by the trigger or a property of the value the trigger is bound to, or must be a system binding expression (e.g. sys.randguid, sys.utcnow, etc.).


add a comment |
follow this tutorial chain-azure-functions-data-using-bindings,
when using JavaScript it works, however created a new function app with .net as run time stack, added required cosmos db mappings, when sending GET request with query param like
https://azurefuncurl?code=abc&id=docs
appinsights reveals azure function/host wont start because of System.InvalidOperationException
tried going through official documentation: azure-functions/configInput-Usage, no luck
function.json
{
"bindings": [
{
"authLevel": "function",
"name": "req",
"type": "httpTrigger",
"direction": "in",
"methods": [
"get",
"post"
]
},
{
"name": "$return",
"type": "http",
"direction": "out"
},
{
"type": "cosmosDB",
"name": "bookmark",
"databaseName": "func-io-learn-db",
"collectionName": "Bookmarks",
"connectionStringSetting": "chainazurefunctions_DOCUMENTDB",
"id": "{id}",
"partitionKey": "{id}",
"direction": "in"
}]
}
run.csx
#r "Newtonsoft.Json"
using System.Net;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Primitives;
using Newtonsoft.Json;
public static async Task<IActionResult> Run(HttpRequest req, ILogger log, dynamic bookmark)
{
log.LogInformation("C# HTTP trigger function processed a request.");
string name = req.Query["id"];
string requestBody = await new StreamReader(req.Body).ReadToEndAsync();
dynamic data = JsonConvert.DeserializeObject(requestBody);
name = name ?? data?.name;
return name != null
? (ActionResult)new OkObjectResult($"Hello, {name}")
: new BadRequestObjectResult("Please pass a name on the query string or in the request body");
}
exception message:
Error indexing method 'Functions.find-bookmark' Unable to resolve binding parameter 'id'. Binding expressions must map to either a value provided by the trigger or a property of the value the trigger is bound to, or must be a system binding expression (e.g. sys.randguid, sys.utcnow, etc.).


add a comment |
follow this tutorial chain-azure-functions-data-using-bindings,
when using JavaScript it works, however created a new function app with .net as run time stack, added required cosmos db mappings, when sending GET request with query param like
https://azurefuncurl?code=abc&id=docs
appinsights reveals azure function/host wont start because of System.InvalidOperationException
tried going through official documentation: azure-functions/configInput-Usage, no luck
function.json
{
"bindings": [
{
"authLevel": "function",
"name": "req",
"type": "httpTrigger",
"direction": "in",
"methods": [
"get",
"post"
]
},
{
"name": "$return",
"type": "http",
"direction": "out"
},
{
"type": "cosmosDB",
"name": "bookmark",
"databaseName": "func-io-learn-db",
"collectionName": "Bookmarks",
"connectionStringSetting": "chainazurefunctions_DOCUMENTDB",
"id": "{id}",
"partitionKey": "{id}",
"direction": "in"
}]
}
run.csx
#r "Newtonsoft.Json"
using System.Net;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Primitives;
using Newtonsoft.Json;
public static async Task<IActionResult> Run(HttpRequest req, ILogger log, dynamic bookmark)
{
log.LogInformation("C# HTTP trigger function processed a request.");
string name = req.Query["id"];
string requestBody = await new StreamReader(req.Body).ReadToEndAsync();
dynamic data = JsonConvert.DeserializeObject(requestBody);
name = name ?? data?.name;
return name != null
? (ActionResult)new OkObjectResult($"Hello, {name}")
: new BadRequestObjectResult("Please pass a name on the query string or in the request body");
}
exception message:
Error indexing method 'Functions.find-bookmark' Unable to resolve binding parameter 'id'. Binding expressions must map to either a value provided by the trigger or a property of the value the trigger is bound to, or must be a system binding expression (e.g. sys.randguid, sys.utcnow, etc.).


follow this tutorial chain-azure-functions-data-using-bindings,
when using JavaScript it works, however created a new function app with .net as run time stack, added required cosmos db mappings, when sending GET request with query param like
https://azurefuncurl?code=abc&id=docs
appinsights reveals azure function/host wont start because of System.InvalidOperationException
tried going through official documentation: azure-functions/configInput-Usage, no luck
function.json
{
"bindings": [
{
"authLevel": "function",
"name": "req",
"type": "httpTrigger",
"direction": "in",
"methods": [
"get",
"post"
]
},
{
"name": "$return",
"type": "http",
"direction": "out"
},
{
"type": "cosmosDB",
"name": "bookmark",
"databaseName": "func-io-learn-db",
"collectionName": "Bookmarks",
"connectionStringSetting": "chainazurefunctions_DOCUMENTDB",
"id": "{id}",
"partitionKey": "{id}",
"direction": "in"
}]
}
run.csx
#r "Newtonsoft.Json"
using System.Net;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Primitives;
using Newtonsoft.Json;
public static async Task<IActionResult> Run(HttpRequest req, ILogger log, dynamic bookmark)
{
log.LogInformation("C# HTTP trigger function processed a request.");
string name = req.Query["id"];
string requestBody = await new StreamReader(req.Body).ReadToEndAsync();
dynamic data = JsonConvert.DeserializeObject(requestBody);
name = name ?? data?.name;
return name != null
? (ActionResult)new OkObjectResult($"Hello, {name}")
: new BadRequestObjectResult("Please pass a name on the query string or in the request body");
}
exception message:
Error indexing method 'Functions.find-bookmark' Unable to resolve binding parameter 'id'. Binding expressions must map to either a value provided by the trigger or a property of the value the trigger is bound to, or must be a system binding expression (e.g. sys.randguid, sys.utcnow, etc.).




asked Jan 2 at 5:49
ManiVIManiVI
891112
891112
add a comment |
add a comment |
2 Answers
2
active
oldest
votes
Simply replace {id}
with {Query.id}
, have a look at the csx sample.
Thank you, I did not look hard enough
– ManiVI
Jan 2 at 18:06
add a comment |
for future references
based on Jerry Liu's recommendation
,
I had to replace id
with {Query.id}
in function.json like note values in key id & partitionKey
{
"type": "cosmosDB",
"name": "bookmark",
"databaseName": "func-io-learn-db",
"collectionName": "Bookmarks",
"connectionStringSetting": "chainazurefunctions_DOCUMENTDB",
"id": "{Query.id}",
"partitionKey": "{Query.id}",
"direction": "in"
}
in run.csx
create a POCO model class & use it as a param in Run method, below is what entire run.csx looks like
#r "Newtonsoft.Json"
using System.Net;
using Microsoft.Extensions.Primitives;
using Newtonsoft.Json;
using System.Text;
public class Bookmark
{
[JsonIgnore]
public string id {get; set;}
[JsonProperty(PropertyName ="url")]
public string URL {get;set;}
}
public static HttpResponseMessage Run(HttpRequest req, ILogger log, Bookmark bookmark)
{
log.LogInformation("C# HTTP trigger function processed a request.");
if(bookmark == null)
{
string id = req.Query["id"];
log.LogInformation($"Bookmark item {id} not found");
return new HttpResponseMessage(HttpStatusCode.NotFound)
{
Content = new StringContent($"{id} not found", Encoding.UTF8, "application/json")
};
}
else
{
log.LogInformation($"Found item {bookmark.URL}");
return new HttpResponseMessage(HttpStatusCode.OK)
{
Content = new StringContent(JsonConvert.SerializeObject(bookmark), Encoding.UTF8, "application/json")
};
}
}
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
Simply replace {id}
with {Query.id}
, have a look at the csx sample.
Thank you, I did not look hard enough
– ManiVI
Jan 2 at 18:06
add a comment |
Simply replace {id}
with {Query.id}
, have a look at the csx sample.
Thank you, I did not look hard enough
– ManiVI
Jan 2 at 18:06
add a comment |
Simply replace {id}
with {Query.id}
, have a look at the csx sample.
Simply replace {id}
with {Query.id}
, have a look at the csx sample.
answered Jan 2 at 6:26


Jerry LiuJerry Liu
11.4k11233
11.4k11233
Thank you, I did not look hard enough
– ManiVI
Jan 2 at 18:06
add a comment |
Thank you, I did not look hard enough
– ManiVI
Jan 2 at 18:06
Thank you, I did not look hard enough
– ManiVI
Jan 2 at 18:06
Thank you, I did not look hard enough
– ManiVI
Jan 2 at 18:06
add a comment |
for future references
based on Jerry Liu's recommendation
,
I had to replace id
with {Query.id}
in function.json like note values in key id & partitionKey
{
"type": "cosmosDB",
"name": "bookmark",
"databaseName": "func-io-learn-db",
"collectionName": "Bookmarks",
"connectionStringSetting": "chainazurefunctions_DOCUMENTDB",
"id": "{Query.id}",
"partitionKey": "{Query.id}",
"direction": "in"
}
in run.csx
create a POCO model class & use it as a param in Run method, below is what entire run.csx looks like
#r "Newtonsoft.Json"
using System.Net;
using Microsoft.Extensions.Primitives;
using Newtonsoft.Json;
using System.Text;
public class Bookmark
{
[JsonIgnore]
public string id {get; set;}
[JsonProperty(PropertyName ="url")]
public string URL {get;set;}
}
public static HttpResponseMessage Run(HttpRequest req, ILogger log, Bookmark bookmark)
{
log.LogInformation("C# HTTP trigger function processed a request.");
if(bookmark == null)
{
string id = req.Query["id"];
log.LogInformation($"Bookmark item {id} not found");
return new HttpResponseMessage(HttpStatusCode.NotFound)
{
Content = new StringContent($"{id} not found", Encoding.UTF8, "application/json")
};
}
else
{
log.LogInformation($"Found item {bookmark.URL}");
return new HttpResponseMessage(HttpStatusCode.OK)
{
Content = new StringContent(JsonConvert.SerializeObject(bookmark), Encoding.UTF8, "application/json")
};
}
}
add a comment |
for future references
based on Jerry Liu's recommendation
,
I had to replace id
with {Query.id}
in function.json like note values in key id & partitionKey
{
"type": "cosmosDB",
"name": "bookmark",
"databaseName": "func-io-learn-db",
"collectionName": "Bookmarks",
"connectionStringSetting": "chainazurefunctions_DOCUMENTDB",
"id": "{Query.id}",
"partitionKey": "{Query.id}",
"direction": "in"
}
in run.csx
create a POCO model class & use it as a param in Run method, below is what entire run.csx looks like
#r "Newtonsoft.Json"
using System.Net;
using Microsoft.Extensions.Primitives;
using Newtonsoft.Json;
using System.Text;
public class Bookmark
{
[JsonIgnore]
public string id {get; set;}
[JsonProperty(PropertyName ="url")]
public string URL {get;set;}
}
public static HttpResponseMessage Run(HttpRequest req, ILogger log, Bookmark bookmark)
{
log.LogInformation("C# HTTP trigger function processed a request.");
if(bookmark == null)
{
string id = req.Query["id"];
log.LogInformation($"Bookmark item {id} not found");
return new HttpResponseMessage(HttpStatusCode.NotFound)
{
Content = new StringContent($"{id} not found", Encoding.UTF8, "application/json")
};
}
else
{
log.LogInformation($"Found item {bookmark.URL}");
return new HttpResponseMessage(HttpStatusCode.OK)
{
Content = new StringContent(JsonConvert.SerializeObject(bookmark), Encoding.UTF8, "application/json")
};
}
}
add a comment |
for future references
based on Jerry Liu's recommendation
,
I had to replace id
with {Query.id}
in function.json like note values in key id & partitionKey
{
"type": "cosmosDB",
"name": "bookmark",
"databaseName": "func-io-learn-db",
"collectionName": "Bookmarks",
"connectionStringSetting": "chainazurefunctions_DOCUMENTDB",
"id": "{Query.id}",
"partitionKey": "{Query.id}",
"direction": "in"
}
in run.csx
create a POCO model class & use it as a param in Run method, below is what entire run.csx looks like
#r "Newtonsoft.Json"
using System.Net;
using Microsoft.Extensions.Primitives;
using Newtonsoft.Json;
using System.Text;
public class Bookmark
{
[JsonIgnore]
public string id {get; set;}
[JsonProperty(PropertyName ="url")]
public string URL {get;set;}
}
public static HttpResponseMessage Run(HttpRequest req, ILogger log, Bookmark bookmark)
{
log.LogInformation("C# HTTP trigger function processed a request.");
if(bookmark == null)
{
string id = req.Query["id"];
log.LogInformation($"Bookmark item {id} not found");
return new HttpResponseMessage(HttpStatusCode.NotFound)
{
Content = new StringContent($"{id} not found", Encoding.UTF8, "application/json")
};
}
else
{
log.LogInformation($"Found item {bookmark.URL}");
return new HttpResponseMessage(HttpStatusCode.OK)
{
Content = new StringContent(JsonConvert.SerializeObject(bookmark), Encoding.UTF8, "application/json")
};
}
}
for future references
based on Jerry Liu's recommendation
,
I had to replace id
with {Query.id}
in function.json like note values in key id & partitionKey
{
"type": "cosmosDB",
"name": "bookmark",
"databaseName": "func-io-learn-db",
"collectionName": "Bookmarks",
"connectionStringSetting": "chainazurefunctions_DOCUMENTDB",
"id": "{Query.id}",
"partitionKey": "{Query.id}",
"direction": "in"
}
in run.csx
create a POCO model class & use it as a param in Run method, below is what entire run.csx looks like
#r "Newtonsoft.Json"
using System.Net;
using Microsoft.Extensions.Primitives;
using Newtonsoft.Json;
using System.Text;
public class Bookmark
{
[JsonIgnore]
public string id {get; set;}
[JsonProperty(PropertyName ="url")]
public string URL {get;set;}
}
public static HttpResponseMessage Run(HttpRequest req, ILogger log, Bookmark bookmark)
{
log.LogInformation("C# HTTP trigger function processed a request.");
if(bookmark == null)
{
string id = req.Query["id"];
log.LogInformation($"Bookmark item {id} not found");
return new HttpResponseMessage(HttpStatusCode.NotFound)
{
Content = new StringContent($"{id} not found", Encoding.UTF8, "application/json")
};
}
else
{
log.LogInformation($"Found item {bookmark.URL}");
return new HttpResponseMessage(HttpStatusCode.OK)
{
Content = new StringContent(JsonConvert.SerializeObject(bookmark), Encoding.UTF8, "application/json")
};
}
}
answered Jan 2 at 18:17
ManiVIManiVI
891112
891112
add a comment |
add a comment |
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